diff --git a/src/applications/differential/mail/comment/DifferentialCommentMail.php b/src/applications/differential/mail/comment/DifferentialCommentMail.php
index 060264b166..fb5695dee0 100644
--- a/src/applications/differential/mail/comment/DifferentialCommentMail.php
+++ b/src/applications/differential/mail/comment/DifferentialCommentMail.php
@@ -71,6 +71,32 @@ class DifferentialCommentMail extends DifferentialMail {
     $body  = array();
 
     $body[] = "{$actor} has {$verb} the revision \"{$name}\".";
+
+    // If the commented added reviewers or CCs, list them explicitly.
+    $meta = $comment->getMetadata();
+    $m_reviewers = idx(
+      $meta,
+      DifferentialComment::METADATA_ADDED_REVIEWERS,
+      array());
+    $m_cc = idx(
+      $meta,
+      DifferentialComment::METADATA_ADDED_CCS,
+      array());
+    $load = array_merge($m_reviewers, $m_cc);
+    if ($load) {
+      $handles = id(new PhabricatorObjectHandleData($load))->loadHandles();
+      if ($m_reviewers) {
+        $body[] = 'Added Reviewers: '.$this->renderHandleList(
+          $handles,
+          $m_reviewers);
+      }
+      if ($m_cc) {
+        $body[] = 'Added CCs: '.$this->renderHandleList(
+          $handles,
+          $m_cc);
+      }
+    }
+
     $body[] = null;
 
     $content = $comment->getContent();
@@ -134,4 +160,12 @@ class DifferentialCommentMail extends DifferentialMail {
 
     return implode("\n", $body);
   }
+
+  private function renderHandleList(array $handles, array $phids) {
+    $names = array();
+    foreach ($phids as $phid) {
+      $names[] = $handles[$phid]->getName();
+    }
+    return implode(', ', $names);
+  }
 }
diff --git a/src/applications/differential/mail/comment/__init__.php b/src/applications/differential/mail/comment/__init__.php
index f6f1281398..51b6e24688 100644
--- a/src/applications/differential/mail/comment/__init__.php
+++ b/src/applications/differential/mail/comment/__init__.php
@@ -9,6 +9,7 @@
 phutil_require_module('phabricator', 'applications/differential/constants/action');
 phutil_require_module('phabricator', 'applications/differential/constants/revisionstatus');
 phutil_require_module('phabricator', 'applications/differential/mail/base');
+phutil_require_module('phabricator', 'applications/differential/storage/comment');
 phutil_require_module('phabricator', 'applications/phid/handle/data');
 phutil_require_module('phabricator', 'infrastructure/env');