diff --git a/pagure/lib/__init__.py b/pagure/lib/__init__.py
index 47132ac..36d9a9f 100644
--- a/pagure/lib/__init__.py
+++ b/pagure/lib/__init__.py
@@ -1930,3 +1930,15 @@ def get_user_group(session, userid, groupid):
     )
 
     return query.first()
+
+
+def is_group_member(session, user, groupname):
+    """ Return whether the user is a member of the specified group. """
+    if not user:
+        return False
+
+    user = search_user(session, username=user)
+    if not user:
+        return False
+
+    return groupname in user.groups