Joseph Gordon-Levitt, huh :3 For his early stuff, check out 3rd Rock from the Sun. It was a sitcom about 4 aliens who come to study Earth and pose as a human family - he's the Information Officer posing as the son, and he's utterly adorable.

He also had a minor role in Latter Days, a cute indie gay love story. And I'd swear he did some voice acting too, but I can't remember off the top of my head.

Good luck with the hair dying :)