Index: ./django/template/defaulttags.py
===================================================================
--- ./django/template/defaulttags.py	(revision 7947)
+++ ./django/template/defaulttags.py	(working copy)
@@ -270,6 +270,9 @@
             return ''
         # List of dictionaries in the format:
         # {'grouper': 'key', 'list': [list of contents]}.
+
+        obj_list = sorted(obj_list, key=lambda x: x[key])
+
         context[self.var_name] = [
             {'grouper': key, 'list': list(val)}
             for key, val in