diff --git a/_config/comments.yml b/_config/comments.yml
new file mode 100644
index 0000000..54ed4fa
--- /dev/null
+++ b/_config/comments.yml
@@ -0,0 +1,8 @@
+---
+Name: blogcommentsconfig
+Only:
+  moduleexists: comments
+---
+Comment:
+  extensions:
+    - BlogCommentExtension
diff --git a/_config/config.yml b/_config/config.yml
index 2bf9426..0d399de 100755
--- a/_config/config.yml
+++ b/_config/config.yml
@@ -1,3 +1,6 @@
+---
+Name: blogconfig
+---
 Member:
   extensions:
-    - BlogMemberExtension
\ No newline at end of file
+    - BlogMemberExtension
diff --git a/code/extensions/BlogCommentExtension.php b/code/extensions/BlogCommentExtension.php
new file mode 100644
index 0000000..8b2db4a
--- /dev/null
+++ b/code/extensions/BlogCommentExtension.php
@@ -0,0 +1,23 @@
+<?php
+
+/**
+ * Adds Blog specific behaviour to Comment
+ * Extends {@see Comment}
+ */
+class BlogCommentExtension extends DataExtension {
+
+	/**
+	 * Extra CSS classes for styling different comment types.
+	 * @return string
+	 */
+	public function getExtraClass() {
+		$blogPost = $this->owner->getParent();
+		
+		// Make sure we're dealing with a BlogPost.
+		if (  ($blogPost instanceof BlogPost)
+			&& $blogPost->isAuthor($this->owner->Author())
+		) {
+			return 'author-comment';
+		}
+	}
+}