"School of Rock" Kid's Mug and Apology

Joey Gaydos Jr. -- the guitar prodigy from "School of Rock" -- is now apologizing for his underage DUI bust last month.

Here's the statement Joey sent to TMZ:

"Some of you may have seen video footage of me on shows like TMZ, or your local news regarding an unfortunate incident I had a few weeks ago.

The first thing I would like to say is, I made a HUGE mistake, and I really regret my actions. What I did was wrong, and all I can say is, I'm sorry to anyone I may have let down, I'm only human, and we ALL make mistakes.

To everyone who has supported me through this I would like to say, THANK YOU, it really means a lot."