diff --git a/src/applications/differential/editor/DifferentialRevisionEditor.php b/src/applications/differential/editor/DifferentialRevisionEditor.php
index ee1b23ff9c..e4dc8db969 100644
--- a/src/applications/differential/editor/DifferentialRevisionEditor.php
+++ b/src/applications/differential/editor/DifferentialRevisionEditor.php
@@ -162,6 +162,18 @@ final class DifferentialRevisionEditor extends PhabricatorEditor {
       $this->cc = $revision->getCCPHIDs();
     }
 
+    if ($is_new) {
+      $content_blocks = array();
+      foreach ($this->auxiliaryFields as $field) {
+        if ($field->shouldExtractMentions()) {
+          $content_blocks[] = $field->renderValueForCommitMessage(false);
+        }
+      }
+      $phids = PhabricatorMarkupEngine::extractPHIDsFromMentions(
+        $content_blocks);
+      $this->cc = array_unique(array_merge($this->cc, $phids));
+    }
+
     $diff = $this->getDiff();
     if ($diff) {
       $revision->setLineCount($diff->getLineCount());
diff --git a/src/applications/differential/field/specification/DifferentialFieldSpecification.php b/src/applications/differential/field/specification/DifferentialFieldSpecification.php
index cce1c250f9..2f78967d7d 100644
--- a/src/applications/differential/field/specification/DifferentialFieldSpecification.php
+++ b/src/applications/differential/field/specification/DifferentialFieldSpecification.php
@@ -165,6 +165,20 @@ abstract class DifferentialFieldSpecification {
     return;
   }
 
+  /**
+   * Determine if user mentions should be extracted from the value and added to
+   * CC when creating revision. Mentions are then extracted from the string
+   * returned by @{method:renderValueForCommitMessage}.
+   *
+   * By default, mentions are not extracted.
+   *
+   * @return bool
+   * @task edit
+   */
+  public function shouldExtractMentions() {
+    return false;
+  }
+
   /**
    * Hook for applying revision changes via the editor. Normally, you should
    * not implement this, but a number of builtin fields use the revision object
diff --git a/src/applications/differential/field/specification/DifferentialSummaryFieldSpecification.php b/src/applications/differential/field/specification/DifferentialSummaryFieldSpecification.php
index 20a11bfef7..59beb0f8c9 100644
--- a/src/applications/differential/field/specification/DifferentialSummaryFieldSpecification.php
+++ b/src/applications/differential/field/specification/DifferentialSummaryFieldSpecification.php
@@ -25,6 +25,10 @@ final class DifferentialSummaryFieldSpecification
       ->setValue($this->summary);
   }
 
+  public function shouldExtractMentions() {
+    return true;
+  }
+
   public function willWriteRevision(DifferentialRevisionEditor $editor) {
     $this->getRevision()->setSummary($this->summary);
   }
diff --git a/src/applications/differential/field/specification/DifferentialTestPlanFieldSpecification.php b/src/applications/differential/field/specification/DifferentialTestPlanFieldSpecification.php
index e73a715f54..9f88204f05 100644
--- a/src/applications/differential/field/specification/DifferentialTestPlanFieldSpecification.php
+++ b/src/applications/differential/field/specification/DifferentialTestPlanFieldSpecification.php
@@ -38,6 +38,10 @@ final class DifferentialTestPlanFieldSpecification
       ->setError($this->error);
   }
 
+  public function shouldExtractMentions() {
+    return true;
+  }
+
   public function willWriteRevision(DifferentialRevisionEditor $editor) {
     $this->getRevision()->setTestPlan($this->plan);
   }
diff --git a/src/applications/differential/field/specification/DifferentialTitleFieldSpecification.php b/src/applications/differential/field/specification/DifferentialTitleFieldSpecification.php
index 9a785d07ab..6a1c6ce20c 100644
--- a/src/applications/differential/field/specification/DifferentialTitleFieldSpecification.php
+++ b/src/applications/differential/field/specification/DifferentialTitleFieldSpecification.php
@@ -29,6 +29,10 @@ final class DifferentialTitleFieldSpecification
       ->setValue($this->title);
   }
 
+  public function shouldExtractMentions() {
+    return true;
+  }
+
   public function willWriteRevision(DifferentialRevisionEditor $editor) {
     $this->getRevision()->setTitle($this->title);
   }