diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -2160,6 +2160,9 @@
     'PhabricatorCalendarImportTriggerLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportTriggerLogType.php',
     'PhabricatorCalendarImportUpdateLogType' => 'applications/calendar/importlog/PhabricatorCalendarImportUpdateLogType.php',
     'PhabricatorCalendarImportViewController' => 'applications/calendar/controller/PhabricatorCalendarImportViewController.php',
+    'PhabricatorCalendarInviteeDatasource' => 'applications/calendar/typeahead/PhabricatorCalendarInviteeDatasource.php',
+    'PhabricatorCalendarInviteeUserDatasource' => 'applications/calendar/typeahead/PhabricatorCalendarInviteeUserDatasource.php',
+    'PhabricatorCalendarInviteeViewerFunctionDatasource' => 'applications/calendar/typeahead/PhabricatorCalendarInviteeViewerFunctionDatasource.php',
     'PhabricatorCalendarManagementNotifyWorkflow' => 'applications/calendar/management/PhabricatorCalendarManagementNotifyWorkflow.php',
     'PhabricatorCalendarManagementReloadWorkflow' => 'applications/calendar/management/PhabricatorCalendarManagementReloadWorkflow.php',
     'PhabricatorCalendarManagementWorkflow' => 'applications/calendar/management/PhabricatorCalendarManagementWorkflow.php',
@@ -7041,6 +7044,9 @@
     'PhabricatorCalendarImportTriggerLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportUpdateLogType' => 'PhabricatorCalendarImportLogType',
     'PhabricatorCalendarImportViewController' => 'PhabricatorCalendarController',
+    'PhabricatorCalendarInviteeDatasource' => 'PhabricatorTypeaheadCompositeDatasource',
+    'PhabricatorCalendarInviteeUserDatasource' => 'PhabricatorTypeaheadCompositeDatasource',
+    'PhabricatorCalendarInviteeViewerFunctionDatasource' => 'PhabricatorTypeaheadDatasource',
     'PhabricatorCalendarManagementNotifyWorkflow' => 'PhabricatorCalendarManagementWorkflow',
     'PhabricatorCalendarManagementReloadWorkflow' => 'PhabricatorCalendarManagementWorkflow',
     'PhabricatorCalendarManagementWorkflow' => 'PhabricatorManagementWorkflow',
diff --git a/src/applications/calendar/query/PhabricatorCalendarEventSearchEngine.php b/src/applications/calendar/query/PhabricatorCalendarEventSearchEngine.php
--- a/src/applications/calendar/query/PhabricatorCalendarEventSearchEngine.php
+++ b/src/applications/calendar/query/PhabricatorCalendarEventSearchEngine.php
@@ -36,7 +36,7 @@
       id(new PhabricatorSearchDatasourceField())
         ->setLabel(pht('Invited'))
         ->setKey('invitedPHIDs')
-        ->setDatasource(new PhabricatorPeopleUserFunctionDatasource()),
+        ->setDatasource(new PhabricatorCalendarInviteeDatasource()),
       id(new PhabricatorSearchDateControlField())
         ->setLabel(pht('Occurs After'))
         ->setKey('rangeStart'),
diff --git a/src/applications/calendar/typeahead/PhabricatorCalendarInviteeDatasource.php b/src/applications/calendar/typeahead/PhabricatorCalendarInviteeDatasource.php
new file mode 100644
--- /dev/null
+++ b/src/applications/calendar/typeahead/PhabricatorCalendarInviteeDatasource.php
@@ -0,0 +1,53 @@
+<?php
+
+final class PhabricatorCalendarInviteeDatasource
+  extends PhabricatorTypeaheadCompositeDatasource {
+
+  public function getBrowseTitle() {
+    return pht('Browse Invitees');
+  }
+
+  public function getPlaceholderText() {
+    return pht('Type a user or project name, or function...');
+  }
+
+  public function getDatasourceApplicationClass() {
+    return 'PhabricatorCalendarApplication';
+  }
+
+  public function getComponentDatasources() {
+    return array(
+      new PhabricatorCalendarInviteeUserDatasource(),
+      new PhabricatorCalendarInviteeViewerFunctionDatasource(),
+      new DifferentialExactUserFunctionDatasource(),
+      new PhabricatorProjectDatasource(),
+    );
+  }
+
+  public static function expandInvitees(
+    PhabricatorUser $viewer,
+    array $values) {
+
+    $phids = array();
+    foreach ($values as $value) {
+      if (phid_get_type($value) == PhabricatorPeopleUserPHIDType::TYPECONST) {
+        $phids[] = $value;
+      }
+    }
+
+    if (!$phids) {
+      return $values;
+    }
+
+    $projects = id(new PhabricatorProjectQuery())
+       ->setViewer($viewer)
+       ->withMemberPHIDs($phids)
+       ->execute();
+    foreach ($projects as $project) {
+      $values[] = $project->getPHID();
+    }
+
+    return $values;
+  }
+
+}
diff --git a/src/applications/calendar/typeahead/PhabricatorCalendarInviteeUserDatasource.php b/src/applications/calendar/typeahead/PhabricatorCalendarInviteeUserDatasource.php
new file mode 100644
--- /dev/null
+++ b/src/applications/calendar/typeahead/PhabricatorCalendarInviteeUserDatasource.php
@@ -0,0 +1,30 @@
+<?php
+
+final class PhabricatorCalendarInviteeUserDatasource
+  extends PhabricatorTypeaheadCompositeDatasource {
+
+  public function getBrowseTitle() {
+    return pht('Browse Users');
+  }
+
+  public function getPlaceholderText() {
+    return pht('Type a user name...');
+  }
+
+  public function getDatasourceApplicationClass() {
+    return 'PhabricatorCalendarApplication';
+  }
+
+  public function getComponentDatasources() {
+    return array(
+      new PhabricatorPeopleDatasource(),
+    );
+  }
+
+  protected function evaluateValues(array $values) {
+    return PhabricatorCalendarInviteeDatasource::expandInvitees(
+      $this->getViewer(),
+      $values);
+  }
+
+}
diff --git a/src/applications/calendar/typeahead/PhabricatorCalendarInviteeViewerFunctionDatasource.php b/src/applications/calendar/typeahead/PhabricatorCalendarInviteeViewerFunctionDatasource.php
new file mode 100644
--- /dev/null
+++ b/src/applications/calendar/typeahead/PhabricatorCalendarInviteeViewerFunctionDatasource.php
@@ -0,0 +1,77 @@
+<?php
+
+final class PhabricatorCalendarInviteeViewerFunctionDatasource
+  extends PhabricatorTypeaheadDatasource {
+
+  public function getBrowseTitle() {
+    return pht('Browse Viewer');
+  }
+
+  public function getPlaceholderText() {
+    return pht('Type viewer()...');
+  }
+
+  public function getDatasourceApplicationClass() {
+    return 'PhabricatorPeopleApplication';
+  }
+
+  public function getDatasourceFunctions() {
+    return array(
+      'viewer' => array(
+        'name' => pht('Current Viewer'),
+        'summary' => pht('Use the current viewing user.'),
+        'description' => pht(
+          'Show invites the current viewer is invited to. This function '.
+          'includes events the user is invited to because a project they '.
+          'are a member of is invited.'),
+      ),
+    );
+  }
+
+  public function loadResults() {
+    if ($this->getViewer()->getPHID()) {
+      $results = array($this->renderViewerFunctionToken());
+    } else {
+      $results = array();
+    }
+
+    return $this->filterResultsAgainstTokens($results);
+  }
+
+  protected function canEvaluateFunction($function) {
+    if (!$this->getViewer()->getPHID()) {
+      return false;
+    }
+
+    return parent::canEvaluateFunction($function);
+  }
+
+  protected function evaluateFunction($function, array $argv_list) {
+    $results = array();
+    foreach ($argv_list as $argv) {
+      $results[] = $this->getViewer()->getPHID();
+    }
+
+    return PhabricatorCalendarInviteeDatasource::expandInvitees(
+      $this->getViewer(),
+      $results);
+  }
+
+  public function renderFunctionTokens($function, array $argv_list) {
+    $tokens = array();
+    foreach ($argv_list as $argv) {
+      $tokens[] = PhabricatorTypeaheadTokenView::newFromTypeaheadResult(
+        $this->renderViewerFunctionToken());
+    }
+    return $tokens;
+  }
+
+  private function renderViewerFunctionToken() {
+    return $this->newFunctionResult()
+      ->setName(pht('Current Viewer'))
+      ->setPHID('viewer()')
+      ->setIcon('fa-user')
+      ->setUnique(true);
+  }
+
+}
diff --git a/src/applications/differential/typeahead/DifferentialExactUserFunctionDatasource.php b/src/applications/differential/typeahead/DifferentialExactUserFunctionDatasource.php
--- a/src/applications/differential/typeahead/DifferentialExactUserFunctionDatasource.php
+++ b/src/applications/differential/typeahead/DifferentialExactUserFunctionDatasource.php
@@ -12,7 +12,7 @@
   }
 
   public function getDatasourceApplicationClass() {
-    return 'PhabricatorDifferentialApplication';
+    return 'PhabricatorPeopleApplication';
   }
 
   public function getComponentDatasources() {