Long before he was the lead-singer of the self-appointed greatest band in the world, Jack Black was a pint-sized pitch-man for Atari. Check it out:
The comments are worth sticking around for too. They range from, "He's so adorable… and FRIGGIN' ASS-KICKING AND AWESOME!" to "The guy is a greasy fat unfunny turdgargler." However, we found, "he looks the same, but less fat lol," to be the most thoughtful. less fat lol, indeed.
Tags: Video

Don't forget, you can also see young JB in The Neverending Story III.
http://www.jackblack.net/gallery/albums/userpics/10002/uvs050706-016.JPG