diff --git a/boards/models/thread.py b/boards/models/thread.py
--- a/boards/models/thread.py
+++ b/boards/models/thread.py
@@ -87,8 +87,7 @@ class Thread(models.Model):
             if reply_count > 0:
                 reply_count_to_show = min(settings.LAST_REPLIES_COUNT,
                                           reply_count - 1)
-                replies = self.replies.order_by('pub_time').defer(
-                    'poster_user_agent', 'text_markup_type')
+                replies = self.get_replies()
                 last_replies = replies[reply_count - reply_count_to_show:]
 
                 return last_replies
@@ -107,7 +106,7 @@ class Thread(models.Model):
         Gets sorted thread posts
         """
 
-        query = self.replies.order_by('pub_time')
+        query = self.replies.order_by('pub_time').prefetch_related('images')
         if view_fields_only:
             query = query.defer('poster_user_agent', 'text_markup_type')
         return query.all()
@@ -161,4 +160,4 @@ class Thread(models.Model):
         Gets opening post's pub time because thread does not have its own one.
         """
 
-        return self.get_opening_post().pub_time
\ No newline at end of file
+        return self.get_opening_post().pub_time
diff --git a/boards/templates/boards/post.html b/boards/templates/boards/post.html
--- a/boards/templates/boards/post.html
+++ b/boards/templates/boards/post.html
@@ -47,7 +47,7 @@
             {% endif %}
         </div>
         {% if post.images.exists %}
-            {% with post.get_first_image as image %}
+            {% with post.images.all.0 as image %}
             <div class="image">
                 <a
                         class="thumb"