Skylar Astin had a lot of jobs in high school. First of all, he was already acting professionally. But he also worked as a telemarketer, which he used as an opportunity to practice his dialects, and at Hollister, where he had to ask grown men, "Do you support our flops?" This is the last episode...

Noah Wyle of "ER" fame went to a boarding school, where, in addition to his schoolwork, he had to care for a horse. But in between mucking out the stall and riding practice, he still found time to get in plenty of trouble and discover his passion for acting.

Megan Mullally, AKA Karen from "Will and Grace," knew she wanted to be a performer from day one. She entered high school focused on ballet, but one fateful cabaret-style singing performance gave her the bug.