You've probably been in love with Patrick Dempsey forever -- at least since the late 1980s. Those eyes. That wavy hair. He's aged gracefully since Can't Buy Me Love, hasn't he? But what about his new pals on Grey's Anatomy? They might seem like old friends now, but before the show started most of them were just bit players in Hollywood. You saw them around, but did you notice them? If you did, you'll be able to match the young stars with the biggest project they had before making it big on ABC.