diff --git a/kallithea/public/js/base.js b/kallithea/public/js/base.js
--- a/kallithea/public/js/base.js
+++ b/kallithea/public/js/base.js
@@ -1379,7 +1379,10 @@ var MentionsAutoComplete = function (inp
 }
 
 var addReviewMember = function(id,fname,lname,nname,gravatar_link,gravatar_size){
-    var displayname = "{0} {1}".format(fname, lname);
+    var displayname = nname;
+    if ((fname != "") && (lname != "")) {
+        displayname = "{0} {1} ({2})".format(fname, lname, nname);
+    }
     var gravatarelm = gravatar(gravatar_link, gravatar_size, "");
     // WARNING: the HTML below is duplicate with
     // kallithea/templates/pullrequests/pullrequest_show.html
diff --git a/kallithea/templates/pullrequests/pullrequest_show.html b/kallithea/templates/pullrequests/pullrequest_show.html
--- a/kallithea/templates/pullrequests/pullrequest_show.html
+++ b/kallithea/templates/pullrequests/pullrequest_show.html
@@ -223,7 +223,7 @@ ${self.repo_context_bar('showpullrequest
                   <div class="reviewer_gravatar gravatar">
                     ${h.gravatar(member.email, size=14)}
                   </div>
-                  <div style="float:left;">${member.full_name} (${_('Owner') if c.pull_request.user_id == member.user_id else _('Reviewer')})</div>
+                  <div style="float:left;">${member.full_name_and_username} (${_('Owner') if c.pull_request.user_id == member.user_id else _('Reviewer')})</div>
                   <input type="hidden" value="${member.user_id}" name="review_members" />
                   %if editable:
                   <div class="reviewer_member_remove action_button" onclick="removeReviewMember(${member.user_id})" title="${_('Remove reviewer')}">