2. Greg Grunberg
Greg Grunberg played the part of Sean in Felicity. Sean was a med student. In the finale of the show, he’s seen giving a toast at Noel’s wedding. Since the scene would be covered with a song by Sarah McLachlan, he knew what he said didn’t matter. So, he gave a speech to his co-stars. In the speech, he allegedly thanked his friends and co-stars and reminisced about the time they had on the show.
After Felicity ended, Greg went on to continue acting, often working with series creator J.J. Abrams. Greg was offered a part in Star Trek but was unable to take it due to conflicting scheduling. He later snagged a role in Star Wars: The Force Awakens as Snap Wexley. Cool, right?