diff --git a/tests/base.py b/tests/base.py
index 77c0644..c567b03 100755
--- a/tests/base.py
+++ b/tests/base.py
@@ -564,6 +564,7 @@
         self.updated_at = None
         self.head_sha = None
         self.is_merged = False
+        self.merge_message = None
         self._createPRRef()
         self._addCommitToRepo()
         self._updateTimeStamp()
@@ -608,6 +609,9 @@
             },
             'repository': {
                 'full_name': self.project
+            },
+            'sender': {
+                'login': 'ghuser'
             }
         }
         return (name, data)
@@ -643,6 +647,9 @@
             },
             'label': {
                 'name': label
+            },
+            'sender': {
+                'login': 'ghuser'
             }
         }
         return (name, data)
@@ -653,6 +660,7 @@
             'action': 'unlabeled',
             'pull_request': {
                 'number': self.number,
+                'title': self.subject,
                 'updated_at': self.updated_at,
                 'base': {
                     'ref': self.branch,
@@ -666,6 +674,9 @@
             },
             'label': {
                 'name': label
+            },
+            'sender': {
+                'login': 'ghuser'
             }
         }
         return (name, data)
@@ -732,6 +743,7 @@
             'number': self.number,
             'pull_request': {
                 'number': self.number,
+                'title': self.subject,
                 'updated_at': self.updated_at,
                 'base': {
                     'ref': self.branch,
@@ -742,6 +754,9 @@
                 'head': {
                     'sha': self.head_sha
                 }
+            },
+            'sender': {
+                'login': 'ghuser'
             }
         }
         return (name, data)
@@ -800,6 +815,7 @@
         pr = self.pull_requests[number - 1]
         data = {
             'number': number,
+            'title': pr.subject,
             'updated_at': pr.updated_at,
             'base': {
                 'repo': {
@@ -814,6 +830,14 @@
         }
         return data
 
+    def getUser(self, login):
+        data = {
+            'username': login,
+            'name': 'Github User',
+            'email': 'github.user@example.com'
+        }
+        return data
+
     def getGitUrl(self, project):
         return os.path.join(self.upstream_root, str(project))
 
@@ -830,7 +854,7 @@
         pull_request = self.pull_requests[pr_number - 1]
         pull_request.addComment(message)
 
-    def mergePull(self, project, pr_number, sha=None):
+    def mergePull(self, project, pr_number, commit_message='', sha=None):
         pull_request = self.pull_requests[pr_number - 1]
         if self.merge_failure:
             raise Exception('Pull request was not merged')
@@ -839,6 +863,7 @@
             raise MergeFailure('Merge was not successful due to mergeability'
                                ' conflict')
         pull_request.is_merged = True
+        pull_request.merge_message = commit_message
 
     def setCommitStatus(self, project, sha, state,
                         url='', description='', context=''):
diff --git a/tests/unit/test_github_driver.py b/tests/unit/test_github_driver.py
index 3f567d2..7267b83 100644
--- a/tests/unit/test_github_driver.py
+++ b/tests/unit/test_github_driver.py
@@ -258,10 +258,13 @@
     @simple_layout('layouts/merging-github.yaml', driver='github')
     def test_report_pull_merge(self):
         # pipeline merges the pull request on success
-        A = self.fake_github.openFakePullRequest('org/project', 'master', 'A')
+        A = self.fake_github.openFakePullRequest('org/project', 'master',
+                                                 'PR title')
         self.fake_github.emitEvent(A.getCommentAddedEvent('merge me'))
         self.waitUntilSettled()
         self.assertTrue(A.is_merged)
+        self.assertThat(A.merge_message,
+                        MatchesRegex('.*PR title.*Reviewed-by.*', re.DOTALL))
 
         # pipeline merges the pull request on success after failure
         self.fake_github.merge_failure = True
diff --git a/zuul/driver/github/githubconnection.py b/zuul/driver/github/githubconnection.py
index f2a8fc0..e8162cd 100644
--- a/zuul/driver/github/githubconnection.py
+++ b/zuul/driver/github/githubconnection.py
@@ -12,6 +12,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+import collections
 import logging
 import hmac
 import hashlib
@@ -100,6 +101,7 @@
         pr_body = body.get('pull_request')
 
         event = self._pull_request_to_event(pr_body)
+        event.account = self._get_sender(body)
 
         event.type = 'pull_request'
         if action == 'opened':
@@ -135,6 +137,7 @@
             return
 
         event = self._pull_request_to_event(pr_body)
+        event.account = self._get_sender(body)
         event.comment = body.get('comment').get('body')
         event.type = 'pull_request'
         event.action = 'comment'
@@ -191,8 +194,43 @@
         event.refspec = "refs/pull/" + str(pr_body.get('number')) + "/head"
         event.patch_number = head.get('sha')
 
+        event.title = pr_body.get('title')
+
         return event
 
+    def _get_sender(self, body):
+        login = body.get('sender').get('login')
+        if login:
+            return self.connection.getUser(login)
+
+
+class GithubUser(collections.Mapping):
+
+    def __init__(self, github, username):
+        self._github = github
+        self._username = username
+        self._data = None
+
+    def __getitem__(self, key):
+        if self._data is None:
+            self._data = self._init_data()
+        return self._data[key]
+
+    def __iter__(self):
+        return iter(self._data)
+
+    def __len__(self):
+        return len(self._data)
+
+    def _init_data(self):
+        user = self._github.user(self._username)
+        data = {
+            'username': user.login,
+            'name': user.name,
+            'email': user.email
+        }
+        return data
+
 
 class GithubConnection(BaseConnection):
     driver_name = 'github'
@@ -250,12 +288,15 @@
             change.url = event.change_url
             change.updated_at = self._ghTimestampToDate(event.updated_at)
             change.patchset = event.patch_number
+            change.title = event.title
+            change.source_event = event
         elif event.ref:
             change = Ref(project)
             change.ref = event.ref
             change.oldrev = event.oldrev
             change.newrev = event.newrev
             change.url = self.getGitwebUrl(project, sha=event.newrev)
+            change.source_event = event
         else:
             change = Ref(project)
         return change
@@ -306,17 +347,23 @@
         # For now, just send back a True value.
         return True
 
+    def getUser(self, login):
+        return GithubUser(self.github, login)
+
+    def getUserUri(self, login):
+        return 'https://%s/%s' % (self.git_host, login)
+
     def commentPull(self, project, pr_number, message):
         owner, proj = project.split('/')
         repository = self.github.repository(owner, proj)
         pull_request = repository.issue(pr_number)
         pull_request.create_comment(message)
 
-    def mergePull(self, project, pr_number, sha=None):
+    def mergePull(self, project, pr_number, commit_message='', sha=None):
         owner, proj = project.split('/')
         pull_request = self.github.pull_request(owner, proj, pr_number)
         try:
-            result = pull_request.merge(sha=sha)
+            result = pull_request.merge(commit_message=commit_message, sha=sha)
         except MethodNotAllowed as e:
             raise MergeFailure('Merge was not successful due to mergeability'
                                ' conflict, original error is %s' % e)
diff --git a/zuul/driver/github/githubreporter.py b/zuul/driver/github/githubreporter.py
index 159103c..a1e8841 100644
--- a/zuul/driver/github/githubreporter.py
+++ b/zuul/driver/github/githubreporter.py
@@ -88,12 +88,13 @@
         sha = item.change.patchset
         self.log.debug('Reporting change %s, params %s, merging via API' %
                        (item.change, self.config))
+        message = self._formatMergeMessage(item.change)
         try:
-            self.connection.mergePull(project, pr_number, sha)
+            self.connection.mergePull(project, pr_number, message, sha)
         except MergeFailure:
             time.sleep(2)
             self.log.debug('Trying to merge change %s again...' % item.change)
-            self.connection.mergePull(project, pr_number, sha)
+            self.connection.mergePull(project, pr_number, message, sha)
         item.change.is_merged = True
 
     def setLabels(self, item):
@@ -110,6 +111,33 @@
         for label in self._unlabels:
                 self.connection.unlabelPull(project, pr_number, label)
 
+    def _formatMergeMessage(self, change):
+        message = ''
+
+        if change.title:
+            message += change.title
+
+        account = change.source_event.account
+        if not account:
+            return message
+
+        username = account['username']
+        name = account['name']
+        email = account['email']
+        message += '\n\nReviewed-by: '
+
+        if name:
+            message += name
+        if email:
+            if name:
+                message += ' '
+            message += '<' + email + '>'
+        if name or email:
+            message += '\n             '
+        message += self.connection.getUserUri(username)
+
+        return message
+
 
 def getSchema():
     def toList(x):
diff --git a/zuul/model.py b/zuul/model.py
index 7ed8339..db49e4e 100644
--- a/zuul/model.py
+++ b/zuul/model.py
@@ -1813,6 +1813,8 @@
         self.status = None
         self.owner = None
 
+        self.source_event = None
+
     def _id(self):
         return '%s,%s' % (self.number, self.patchset)
 
@@ -1863,6 +1865,7 @@
     def __init__(self, project):
         super(PullRequest, self).__init__(project)
         self.updated_at = None
+        self.title = None
 
     def isUpdateOf(self, other):
         if (hasattr(other, 'number') and self.number == other.number and
@@ -1935,6 +1938,10 @@
 
 class GithubTriggerEvent(TriggerEvent):
 
+    def __init__(self):
+        super(GithubTriggerEvent, self).__init__()
+        self.title = None
+
     def isPatchsetCreated(self):
         if self.type == 'pull_request':
             return self.action in ['opened', 'changed']