diff --git a/api/app/Http/Controllers/Api/V1/MemberController.php b/api/app/Http/Controllers/Api/V1/MemberController.php
index 127bd1ba..f3b6d3b6 100644
--- a/api/app/Http/Controllers/Api/V1/MemberController.php
+++ b/api/app/Http/Controllers/Api/V1/MemberController.php
@@ -8,7 +8,9 @@ use App\Http\Controllers\Controller;
 use App\Http\Requests\Api\V1\UpdateMemberRequest;
 use App\Http\Resources\Api\V1\MemberCollection;
 use App\Http\Resources\Api\V1\MemberResource;
+use App\Models\Event;
 use App\Models\Organisation;
+use App\Models\Person;
 use App\Models\User;
 use App\Services\EmailChangeService;
 use Illuminate\Http\JsonResponse;
@@ -84,6 +86,35 @@ final class MemberController extends Controller
         return response()->json(null, 204);
     }
 
+    public function availableForEvent(Organisation $organisation, Event $event): JsonResponse
+    {
+        if ($event->organisation_id !== $organisation->id) {
+            abort(404);
+        }
+
+        Gate::authorize('viewAny', [Person::class, $event]);
+
+        $existingUserIds = Person::withoutGlobalScopes()
+            ->where('event_id', $event->id)
+            ->whereNotNull('user_id')
+            ->pluck('user_id');
+
+        $members = $organisation->users()
+            ->whereNotIn('users.id', $existingUserIds)
+            ->select('users.id', 'users.first_name', 'users.last_name', 'users.email')
+            ->orderBy('users.first_name')
+            ->get()
+            ->map(fn (User $user) => [
+                'id' => $user->id,
+                'first_name' => $user->first_name,
+                'last_name' => $user->last_name,
+                'full_name' => $user->full_name,
+                'email' => $user->email,
+            ]);
+
+        return response()->json(['data' => $members]);
+    }
+
     /**
      * POST /api/v1/organisations/{organisation}/members/{user}/change-email
      * Admin changes a member's email (sends verification to new address).
diff --git a/api/app/Http/Controllers/Api/V1/PersonController.php b/api/app/Http/Controllers/Api/V1/PersonController.php
index 2c7085f0..abfb0a35 100644
--- a/api/app/Http/Controllers/Api/V1/PersonController.php
+++ b/api/app/Http/Controllers/Api/V1/PersonController.php
@@ -4,8 +4,10 @@ declare(strict_types=1);
 
 namespace App\Http\Controllers\Api\V1;
 
+use App\Enums\PersonStatus;
 use App\Http\Controllers\Controller;
 use App\Http\Controllers\Api\V1\Traits\VerifiesOrganisationEvent;
+use App\Http\Requests\Api\V1\StorePersonFromMemberRequest;
 use App\Http\Requests\Api\V1\StorePersonRequest;
 use App\Http\Requests\Api\V1\UpdatePersonRequest;
 use App\Http\Resources\Api\V1\PersonCollection;
@@ -15,12 +17,14 @@ use App\Mail\RegistrationRejectedMail;
 use App\Models\Event;
 use App\Models\Organisation;
 use App\Models\Person;
+use App\Models\User;
 use App\Services\PersonIdentityService;
 use App\Services\TagSyncService;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Gate;
 use Illuminate\Support\Facades\Mail;
+use Illuminate\Validation\ValidationException;
 
 final class PersonController extends Controller
 {
@@ -115,6 +119,46 @@ final class PersonController extends Controller
         return response()->json(null, 204);
     }
 
+    public function createFromMember(StorePersonFromMemberRequest $request, Organisation $organisation, Event $event): JsonResponse
+    {
+        $this->verifyEventBelongsToOrganisation($organisation, $event);
+        Gate::authorize('create', [Person::class, $event]);
+
+        $user = User::findOrFail($request->validated('user_id'));
+
+        if (Person::withoutGlobalScopes()->where('event_id', $event->id)->where('user_id', $user->id)->exists()) {
+            throw ValidationException::withMessages([
+                'user_id' => ['Dit lid is al toegevoegd aan dit evenement.'],
+            ]);
+        }
+
+        if (!$user->organisations()->where('organisations.id', $event->organisation_id)->exists()) {
+            throw ValidationException::withMessages([
+                'user_id' => ['Dit lid behoort niet tot deze organisatie.'],
+            ]);
+        }
+
+        $person = Person::create([
+            'event_id' => $event->id,
+            'crowd_type_id' => $request->validated('crowd_type_id'),
+            'first_name' => $user->first_name,
+            'last_name' => $user->last_name,
+            'email' => $user->email,
+            'status' => PersonStatus::APPROVED->value,
+        ]);
+
+        $person->user_id = $user->id;
+        $person->save();
+
+        activity()
+            ->causedBy(auth()->user())
+            ->performedOn($person)
+            ->withProperties(['source' => 'from_member', 'user_name' => $user->full_name])
+            ->log('person.created_from_member');
+
+        return $this->created(new PersonResource($person->load('crowdType')));
+    }
+
     public function approve(Organisation $organisation, Event $event, Person $person): JsonResponse
     {
         $this->verifyEventBelongsToOrganisation($organisation, $event);
diff --git a/api/app/Http/Requests/Api/V1/StorePersonFromMemberRequest.php b/api/app/Http/Requests/Api/V1/StorePersonFromMemberRequest.php
new file mode 100644
index 00000000..7dc896ec
--- /dev/null
+++ b/api/app/Http/Requests/Api/V1/StorePersonFromMemberRequest.php
@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Requests\Api\V1;
+
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+final class StorePersonFromMemberRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /** @return array<string, mixed> */
+    public function rules(): array
+    {
+        $orgId = $this->route('event')->organisation_id;
+
+        return [
+            'user_id' => ['required', 'ulid', 'exists:users,id'],
+            'crowd_type_id' => ['required', 'ulid', Rule::exists('crowd_types', 'id')->where('organisation_id', $orgId)],
+        ];
+    }
+}
diff --git a/api/routes/api.php b/api/routes/api.php
index 19d384df..edc7eaac 100644
--- a/api/routes/api.php
+++ b/api/routes/api.php
@@ -160,6 +160,7 @@ Route::middleware('auth:sanctum')->group(function () {
         Route::put('members/{user}', [MemberController::class, 'update']);
         Route::delete('members/{user}', [MemberController::class, 'destroy']);
         Route::post('members/{user}/change-email', [MemberController::class, 'changeEmail']);
+        Route::get('members/available-for-event/{event}', [MemberController::class, 'availableForEvent']);
 
         // Event sub-resources (all nested under organisation prefix — A01-13)
         Route::prefix('events/{event}')->group(function () {
@@ -199,6 +200,7 @@ Route::middleware('auth:sanctum')->group(function () {
 
             // Persons
             Route::apiResource('persons', PersonController::class);
+            Route::post('persons/from-member', [PersonController::class, 'createFromMember']);
             Route::post('persons/{person}/approve', [PersonController::class, 'approve']);
             Route::post('persons/{person}/reject', [PersonController::class, 'reject']);
             Route::post('persons/{person}/manual-link', [PersonIdentityMatchController::class, 'manualLink']);
diff --git a/api/tests/Feature/Person/CreatePersonFromMemberTest.php b/api/tests/Feature/Person/CreatePersonFromMemberTest.php
new file mode 100644
index 00000000..89685489
--- /dev/null
+++ b/api/tests/Feature/Person/CreatePersonFromMemberTest.php
@@ -0,0 +1,253 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Feature\Person;
+
+use App\Models\CrowdType;
+use App\Models\Event;
+use App\Models\Organisation;
+use App\Models\Person;
+use App\Models\User;
+use Database\Seeders\RoleSeeder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Laravel\Sanctum\Sanctum;
+use Tests\TestCase;
+
+class CreatePersonFromMemberTest extends TestCase
+{
+    use RefreshDatabase;
+
+    private User $orgAdmin;
+    private User $member;
+    private User $outsider;
+    private Organisation $organisation;
+    private Organisation $otherOrganisation;
+    private Event $event;
+    private CrowdType $crowdType;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->seed(RoleSeeder::class);
+
+        $this->organisation = Organisation::factory()->create();
+        $this->otherOrganisation = Organisation::factory()->create();
+
+        $this->orgAdmin = User::factory()->create();
+        $this->organisation->users()->attach($this->orgAdmin, ['role' => 'org_admin']);
+
+        $this->member = User::factory()->create([
+            'first_name' => 'Jan',
+            'last_name' => 'de Vries',
+            'email' => 'jan@test.nl',
+        ]);
+        $this->organisation->users()->attach($this->member, ['role' => 'org_member']);
+
+        $this->outsider = User::factory()->create();
+        $this->otherOrganisation->users()->attach($this->outsider, ['role' => 'org_admin']);
+
+        $this->event = Event::factory()->create(['organisation_id' => $this->organisation->id]);
+
+        $this->crowdType = CrowdType::factory()->systemType('CREW')->create([
+            'organisation_id' => $this->organisation->id,
+        ]);
+    }
+
+    // --- Available for event ---
+
+    public function test_available_for_event_returns_members_not_yet_person(): void
+    {
+        Sanctum::actingAs($this->orgAdmin);
+
+        $response = $this->getJson(
+            "/api/v1/organisations/{$this->organisation->id}/members/available-for-event/{$this->event->id}"
+        );
+
+        $response->assertOk();
+
+        $data = $response->json('data');
+
+        // Both orgAdmin and member should be available (neither is a person yet)
+        $this->assertCount(2, $data);
+
+        $ids = collect($data)->pluck('id')->all();
+        $this->assertContains($this->orgAdmin->id, $ids);
+        $this->assertContains($this->member->id, $ids);
+    }
+
+    public function test_available_for_event_excludes_already_added_members(): void
+    {
+        // Add member as a person
+        $person = Person::factory()->create([
+            'event_id' => $this->event->id,
+            'crowd_type_id' => $this->crowdType->id,
+        ]);
+        $person->user_id = $this->member->id;
+        $person->save();
+
+        Sanctum::actingAs($this->orgAdmin);
+
+        $response = $this->getJson(
+            "/api/v1/organisations/{$this->organisation->id}/members/available-for-event/{$this->event->id}"
+        );
+
+        $response->assertOk();
+
+        $ids = collect($response->json('data'))->pluck('id')->all();
+        $this->assertNotContains($this->member->id, $ids);
+        $this->assertContains($this->orgAdmin->id, $ids);
+    }
+
+    public function test_available_for_event_returns_correct_fields(): void
+    {
+        Sanctum::actingAs($this->orgAdmin);
+
+        $response = $this->getJson(
+            "/api/v1/organisations/{$this->organisation->id}/members/available-for-event/{$this->event->id}"
+        );
+
+        $response->assertOk()
+            ->assertJsonStructure([
+                'data' => [
+                    '*' => ['id', 'first_name', 'last_name', 'full_name', 'email'],
+                ],
+            ]);
+    }
+
+    public function test_available_for_event_unauthenticated_returns_401(): void
+    {
+        $response = $this->getJson(
+            "/api/v1/organisations/{$this->organisation->id}/members/available-for-event/{$this->event->id}"
+        );
+
+        $response->assertUnauthorized();
+    }
+
+    public function test_available_for_event_wrong_org_returns_403(): void
+    {
+        Sanctum::actingAs($this->outsider);
+
+        $response = $this->getJson(
+            "/api/v1/organisations/{$this->organisation->id}/members/available-for-event/{$this->event->id}"
+        );
+
+        $response->assertForbidden();
+    }
+
+    // --- Create person from member ---
+
+    public function test_create_from_member_creates_person_with_user_id(): void
+    {
+        Sanctum::actingAs($this->orgAdmin);
+
+        $response = $this->postJson(
+            "/api/v1/organisations/{$this->organisation->id}/events/{$this->event->id}/persons/from-member",
+            [
+                'user_id' => $this->member->id,
+                'crowd_type_id' => $this->crowdType->id,
+            ],
+        );
+
+        $response->assertCreated()
+            ->assertJsonPath('data.first_name', 'Jan')
+            ->assertJsonPath('data.last_name', 'de Vries')
+            ->assertJsonPath('data.email', 'jan@test.nl')
+            ->assertJsonPath('data.status', 'approved')
+            ->assertJsonPath('data.has_user_account', true);
+
+        $this->assertDatabaseHas('persons', [
+            'event_id' => $this->event->id,
+            'user_id' => $this->member->id,
+            'first_name' => 'Jan',
+            'last_name' => 'de Vries',
+            'status' => 'approved',
+        ]);
+    }
+
+    public function test_create_from_member_duplicate_returns_422(): void
+    {
+        // Add member as a person first
+        $person = Person::factory()->create([
+            'event_id' => $this->event->id,
+            'crowd_type_id' => $this->crowdType->id,
+        ]);
+        $person->user_id = $this->member->id;
+        $person->save();
+
+        Sanctum::actingAs($this->orgAdmin);
+
+        $response = $this->postJson(
+            "/api/v1/organisations/{$this->organisation->id}/events/{$this->event->id}/persons/from-member",
+            [
+                'user_id' => $this->member->id,
+                'crowd_type_id' => $this->crowdType->id,
+            ],
+        );
+
+        $response->assertUnprocessable()
+            ->assertJsonValidationErrors('user_id');
+    }
+
+    public function test_create_from_member_user_not_in_org_returns_422(): void
+    {
+        Sanctum::actingAs($this->orgAdmin);
+
+        $response = $this->postJson(
+            "/api/v1/organisations/{$this->organisation->id}/events/{$this->event->id}/persons/from-member",
+            [
+                'user_id' => $this->outsider->id,
+                'crowd_type_id' => $this->crowdType->id,
+            ],
+        );
+
+        $response->assertUnprocessable()
+            ->assertJsonValidationErrors('user_id');
+    }
+
+    public function test_create_from_member_unauthenticated_returns_401(): void
+    {
+        $response = $this->postJson(
+            "/api/v1/organisations/{$this->organisation->id}/events/{$this->event->id}/persons/from-member",
+            [
+                'user_id' => $this->member->id,
+                'crowd_type_id' => $this->crowdType->id,
+            ],
+        );
+
+        $response->assertUnauthorized();
+    }
+
+    public function test_create_from_member_wrong_org_returns_403(): void
+    {
+        Sanctum::actingAs($this->outsider);
+
+        $response = $this->postJson(
+            "/api/v1/organisations/{$this->organisation->id}/events/{$this->event->id}/persons/from-member",
+            [
+                'user_id' => $this->member->id,
+                'crowd_type_id' => $this->crowdType->id,
+            ],
+        );
+
+        $response->assertForbidden();
+    }
+
+    public function test_create_from_member_logs_activity(): void
+    {
+        Sanctum::actingAs($this->orgAdmin);
+
+        $this->postJson(
+            "/api/v1/organisations/{$this->organisation->id}/events/{$this->event->id}/persons/from-member",
+            [
+                'user_id' => $this->member->id,
+                'crowd_type_id' => $this->crowdType->id,
+            ],
+        )->assertCreated();
+
+        $this->assertDatabaseHas('activity_log', [
+            'description' => 'person.created_from_member',
+            'causer_id' => $this->orgAdmin->id,
+        ]);
+    }
+}
diff --git a/apps/app/components.d.ts b/apps/app/components.d.ts
index bd624a63..0e0e1649 100644
--- a/apps/app/components.d.ts
+++ b/apps/app/components.d.ts
@@ -10,6 +10,7 @@ declare module 'vue' {
     AddEditAddressDialog: typeof import('./src/components/dialogs/AddEditAddressDialog.vue')['default']
     AddEditPermissionDialog: typeof import('./src/components/dialogs/AddEditPermissionDialog.vue')['default']
     AddEditRoleDialog: typeof import('./src/components/dialogs/AddEditRoleDialog.vue')['default']
+    AddMemberAsPersonDialog: typeof import('./src/components/persons/AddMemberAsPersonDialog.vue')['default']
     AddPersonToCrowdListDialog: typeof import('./src/components/crowd-lists/AddPersonToCrowdListDialog.vue')['default']
     AppAutocomplete: typeof import('./src/@core/components/app-form-elements/AppAutocomplete.vue')['default']
     AppBarSearch: typeof import('./src/@core/components/AppBarSearch.vue')['default']
diff --git a/apps/app/src/components/persons/AddMemberAsPersonDialog.vue b/apps/app/src/components/persons/AddMemberAsPersonDialog.vue
new file mode 100644
index 00000000..1769baaf
--- /dev/null
+++ b/apps/app/src/components/persons/AddMemberAsPersonDialog.vue
@@ -0,0 +1,231 @@
+<script setup lang="ts">
+import { useAvailableMembers, useCreatePersonFromMember } from '@/composables/api/usePersons'
+import { useCrowdTypeList } from '@/composables/api/useCrowdTypes'
+import { requiredValidator } from '@core/utils/validators'
+import type { AvailableMember } from '@/types/member'
+
+const props = defineProps<{
+  eventId: string
+  orgId: string
+}>()
+
+const modelValue = defineModel<boolean>({ required: true })
+
+const eventIdRef = computed(() => props.eventId)
+const orgIdRef = computed(() => props.orgId)
+
+const { data: crowdTypes } = useCrowdTypeList(orgIdRef)
+const { data: availableMembers, isLoading, isError, refetch } = useAvailableMembers(orgIdRef, eventIdRef, modelValue)
+const { mutate: createFromMember, isPending: isCreating } = useCreatePersonFromMember(orgIdRef, eventIdRef)
+
+const searchQuery = ref('')
+const selectedCrowdTypeId = ref('')
+const showSuccess = ref(false)
+const successName = ref('')
+const creatingMemberId = ref<string | null>(null)
+const errorMessage = ref('')
+
+const crowdTypeItems = computed(() =>
+  crowdTypes.value
+    ?.filter(ct => ct.is_active && (ct.system_type === 'CREW' || ct.system_type === 'VOLUNTEER'))
+    .map(ct => ({
+      title: ct.name,
+      value: ct.id,
+    })) ?? [],
+)
+
+// Default to first CREW type
+watch(crowdTypeItems, items => {
+  if (!selectedCrowdTypeId.value && items.length > 0) {
+    const crewType = crowdTypes.value?.find(ct => ct.is_active && ct.system_type === 'CREW')
+    selectedCrowdTypeId.value = crewType?.id ?? items[0].value
+  }
+}, { immediate: true })
+
+const filteredMembers = computed(() => {
+  if (!availableMembers.value) return []
+  if (!searchQuery.value) return availableMembers.value
+
+  const q = searchQuery.value.toLowerCase()
+  return availableMembers.value.filter(
+    m => m.full_name.toLowerCase().includes(q) || m.email.toLowerCase().includes(q),
+  )
+})
+
+function onAddMember(member: AvailableMember) {
+  if (!selectedCrowdTypeId.value) return
+
+  creatingMemberId.value = member.id
+  errorMessage.value = ''
+
+  createFromMember(
+    { user_id: member.id, crowd_type_id: selectedCrowdTypeId.value },
+    {
+      onSuccess: () => {
+        successName.value = member.full_name
+        showSuccess.value = true
+        creatingMemberId.value = null
+      },
+      onError: (err: unknown) => {
+        creatingMemberId.value = null
+        const axiosError = err as { response?: { data?: { message?: string; errors?: Record<string, string[]> } } }
+        const data = axiosError.response?.data
+        if (data?.errors?.user_id) {
+          errorMessage.value = data.errors.user_id[0]
+        }
+        else if (data?.message) {
+          errorMessage.value = data.message
+        }
+        else {
+          errorMessage.value = 'Er ging iets mis bij het toevoegen.'
+        }
+      },
+    },
+  )
+}
+
+function onClose() {
+  searchQuery.value = ''
+  errorMessage.value = ''
+}
+</script>
+
+<template>
+  <VDialog
+    v-model="modelValue"
+    max-width="550"
+    @after-leave="onClose"
+  >
+    <VCard title="Lid toevoegen als deelnemer">
+      <VCardText>
+        <VRow>
+          <VCol cols="12">
+            <AppSelect
+              v-model="selectedCrowdTypeId"
+              label="Crowd Type"
+              :items="crowdTypeItems"
+              :rules="[requiredValidator]"
+            />
+          </VCol>
+          <VCol cols="12">
+            <AppTextField
+              v-model="searchQuery"
+              label="Zoek op naam of e-mail"
+              prepend-inner-icon="tabler-search"
+              clearable
+            />
+          </VCol>
+        </VRow>
+
+        <VAlert
+          v-if="errorMessage"
+          type="error"
+          class="mt-4 mb-2"
+          closable
+          @click:close="errorMessage = ''"
+        >
+          {{ errorMessage }}
+        </VAlert>
+
+        <!-- Loading -->
+        <VSkeletonLoader
+          v-if="isLoading"
+          type="list-item-two-line, list-item-two-line, list-item-two-line"
+          class="mt-4"
+        />
+
+        <!-- Error -->
+        <VAlert
+          v-else-if="isError"
+          type="error"
+          class="mt-4"
+        >
+          Kon beschikbare leden niet laden.
+          <template #append>
+            <VBtn
+              variant="text"
+              @click="refetch()"
+            >
+              Opnieuw proberen
+            </VBtn>
+          </template>
+        </VAlert>
+
+        <!-- Empty state -->
+        <div
+          v-else-if="!filteredMembers.length"
+          class="text-center pa-8"
+        >
+          <VIcon
+            icon="tabler-users-check"
+            size="48"
+            class="mb-4 text-disabled"
+          />
+          <p class="text-body-1 text-disabled mb-0">
+            {{ searchQuery
+              ? 'Geen leden gevonden voor deze zoekopdracht'
+              : 'Alle organisatieleden zijn al toegevoegd aan dit evenement'
+            }}
+          </p>
+        </div>
+
+        <!-- Member list -->
+        <VList
+          v-else
+          class="mt-4"
+        >
+          <VListItem
+            v-for="member in filteredMembers"
+            :key="member.id"
+            :disabled="isCreating && creatingMemberId === member.id"
+            @click="onAddMember(member)"
+          >
+            <template #prepend>
+              <VAvatar
+                size="36"
+                color="primary"
+                variant="tonal"
+              >
+                <span class="text-caption">
+                  {{ member.first_name[0] }}{{ member.last_name[0] }}
+                </span>
+              </VAvatar>
+            </template>
+            <VListItemTitle>{{ member.full_name }}</VListItemTitle>
+            <VListItemSubtitle>{{ member.email }}</VListItemSubtitle>
+            <template #append>
+              <VProgressCircular
+                v-if="isCreating && creatingMemberId === member.id"
+                size="20"
+                width="2"
+                indeterminate
+              />
+              <VIcon
+                v-else
+                icon="tabler-plus"
+                size="20"
+              />
+            </template>
+          </VListItem>
+        </VList>
+      </VCardText>
+      <VCardActions>
+        <VSpacer />
+        <VBtn
+          variant="text"
+          @click="modelValue = false"
+        >
+          Sluiten
+        </VBtn>
+      </VCardActions>
+    </VCard>
+  </VDialog>
+
+  <VSnackbar
+    v-model="showSuccess"
+    color="success"
+    :timeout="3000"
+  >
+    {{ successName }} toegevoegd als deelnemer
+  </VSnackbar>
+</template>
diff --git a/apps/app/src/composables/api/usePersons.ts b/apps/app/src/composables/api/usePersons.ts
index 533413ba..d6c5f709 100644
--- a/apps/app/src/composables/api/usePersons.ts
+++ b/apps/app/src/composables/api/usePersons.ts
@@ -1,6 +1,7 @@
 import { useMutation, useQuery, useQueryClient } from '@tanstack/vue-query'
 import type { Ref } from 'vue'
 import { apiClient } from '@/lib/axios'
+import type { AvailableMember } from '@/types/member'
 import type { CreatePersonPayload, Person, UpdatePersonPayload } from '@/types/person'
 
 interface ApiResponse<T> {
@@ -128,3 +129,36 @@ export function useDeletePerson(orgId: Ref<string>, eventId: Ref<string>) {
     },
   })
 }
+
+export function useAvailableMembers(orgId: Ref<string>, eventId: Ref<string>, enabled: Ref<boolean>) {
+  return useQuery({
+    queryKey: ['available-members', orgId, eventId],
+    queryFn: async () => {
+      const { data } = await apiClient.get<{ data: AvailableMember[] }>(
+        `/organisations/${orgId.value}/members/available-for-event/${eventId.value}`,
+      )
+
+      return data.data
+    },
+    enabled: () => !!orgId.value && !!eventId.value && enabled.value,
+  })
+}
+
+export function useCreatePersonFromMember(orgId: Ref<string>, eventId: Ref<string>) {
+  const queryClient = useQueryClient()
+
+  return useMutation({
+    mutationFn: async (payload: { user_id: string; crowd_type_id: string }) => {
+      const { data } = await apiClient.post<ApiResponse<Person>>(
+        `/organisations/${orgId.value}/events/${eventId.value}/persons/from-member`,
+        payload,
+      )
+
+      return data.data
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['persons', eventId.value] })
+      queryClient.invalidateQueries({ queryKey: ['available-members', orgId.value, eventId.value] })
+    },
+  })
+}
diff --git a/apps/app/src/pages/events/[id]/persons/index.vue b/apps/app/src/pages/events/[id]/persons/index.vue
index 9886d994..1f62584c 100644
--- a/apps/app/src/pages/events/[id]/persons/index.vue
+++ b/apps/app/src/pages/events/[id]/persons/index.vue
@@ -3,6 +3,7 @@ import { usePersonList, useApprovePerson, useDeletePerson } from '@/composables/
 import { useCrowdTypeList } from '@/composables/api/useCrowdTypes'
 import { useAuthStore } from '@/stores/useAuthStore'
 import EventTabsNav from '@/components/events/EventTabsNav.vue'
+import AddMemberAsPersonDialog from '@/components/persons/AddMemberAsPersonDialog.vue'
 import CreatePersonDialog from '@/components/persons/CreatePersonDialog.vue'
 import EditPersonDialog from '@/components/persons/EditPersonDialog.vue'
 import PersonDetailPanel from '@/components/persons/PersonDetailPanel.vue'
@@ -112,6 +113,7 @@ function getInitials(name: string) {
 }
 
 // Dialogs & panel
+const isAddMemberDialogOpen = ref(false)
 const isCreateDialogOpen = ref(false)
 const isEditDialogOpen = ref(false)
 const editingPerson = ref<Person | null>(null)
@@ -194,12 +196,21 @@ const crowdTypeOptions = computed(() => [
           style="min-inline-size: 180px;"
         />
       </div>
-      <VBtn
-        prepend-icon="tabler-plus"
-        @click="isCreateDialogOpen = true"
-      >
-        Persoon toevoegen
-      </VBtn>
+      <div class="d-flex gap-x-2">
+        <VBtn
+          prepend-icon="tabler-user-plus"
+          variant="tonal"
+          @click="isAddMemberDialogOpen = true"
+        >
+          Lid toevoegen
+        </VBtn>
+        <VBtn
+          prepend-icon="tabler-plus"
+          @click="isCreateDialogOpen = true"
+        >
+          Persoon toevoegen
+        </VBtn>
+      </div>
     </div>
 
     <!-- KPI Tiles -->
@@ -378,6 +389,13 @@ const crowdTypeOptions = computed(() => [
       </VDataTable>
     </VCard>
 
+    <!-- Add member dialog -->
+    <AddMemberAsPersonDialog
+      v-model="isAddMemberDialogOpen"
+      :event-id="eventId"
+      :org-id="orgId"
+    />
+
     <!-- Create dialog -->
     <CreatePersonDialog
       v-model="isCreateDialogOpen"
diff --git a/apps/app/src/types/member.ts b/apps/app/src/types/member.ts
index 30389731..ed6bf48b 100644
--- a/apps/app/src/types/member.ts
+++ b/apps/app/src/types/member.ts
@@ -24,6 +24,14 @@ export type OrganisationRole =
   | 'staff_coordinator'
   | 'volunteer_coordinator'
 
+export interface AvailableMember {
+  id: string
+  first_name: string
+  last_name: string
+  full_name: string
+  email: string
+}
+
 export interface MemberListResponse {
   data: Member[]
   meta: {
diff --git a/dev-docs/API.md b/dev-docs/API.md
index 2f0df239..45e69330 100644
--- a/dev-docs/API.md
+++ b/dev-docs/API.md
@@ -355,6 +355,50 @@ Validates:
 - `PUT /organisations/{org}/events/{event}/persons/{person}`
 - `POST /organisations/{org}/events/{event}/persons/{person}/approve`
 - `DELETE /organisations/{org}/events/{event}/persons/{person}`
+- `POST /organisations/{org}/events/{event}/persons/from-member` — create person from org member
+- `GET /organisations/{org}/members/available-for-event/{event}` — list members not yet added to event
+
+### Create Person from Member
+
+`POST /organisations/{org}/events/{event}/persons/from-member`
+
+Creates a Person record from an existing organisation member. The person is created with `status: approved` and `user_id` pre-linked.
+
+```json
+{
+  "user_id": "01JXYZ...",
+  "crowd_type_id": "01JXYZ..."
+}
+```
+
+Person data (first_name, last_name, email) is copied from the user account. Returns `PersonResource` (201).
+
+**Validation:**
+- User must belong to the organisation
+- User must not already be a person at this event (422)
+- crowd_type_id must belong to the organisation
+
+### Available Members for Event
+
+`GET /organisations/{org}/members/available-for-event/{event}`
+
+Returns organisation members who do NOT yet have a Person record at the specified event. Used to populate the "Lid toevoegen" dialog.
+
+```json
+{
+  "data": [
+    {
+      "id": "01JXYZ...",
+      "first_name": "Jan",
+      "last_name": "de Vries",
+      "full_name": "Jan de Vries",
+      "email": "jan@example.nl"
+    }
+  ]
+}
+```
+
+Auth: org member or higher on the organisation.
 
 ## Identity Matches