diff --git a/boards/models.py b/boards/models.py
--- a/boards/models.py
+++ b/boards/models.py
@@ -110,7 +110,7 @@ class PostManager(models.Manager):
 
         if opening_post.replies:
             thread = [opening_post]
-            thread.extend(opening_post.replies.all())
+            thread.extend(opening_post.replies.all().order_by('pub_time'))
 
             return thread
 
@@ -269,7 +269,7 @@ class Post(models.Model):
             if reply_count > 0:
                 reply_count_to_show = min(settings.LAST_REPLIES_COUNT,
                                           reply_count)
-                last_replies = self.replies.all()[reply_count -
+                last_replies = self.replies.all().order_by('pub_time')[reply_count -
                                                   reply_count_to_show:]
 
                 return last_replies