Last Updated Plugin

I have looked through a lot of plugins and I have not found what I am looking for, so hopefully someone maybe able to help me.

What I am looking for is a plugin that will show underneath the original post date, the date and time the post was updated. Is there such a thing? All I seem to find is a couple that have widgets that will show on the sidebar a list of articles that have recently been update. The theme I have will automatically move the article back to the top of the list when update, but it doesn’t actually show when it was.

Any help would be greatly appreciated.