Take a look at photos of famous pals -- including Ryan Gosling and Justin Timberlake, Connie Britton and Lauren Graham -- who were once roommates before making it big in Hollywood.
Penn Badgley and Milo Ventimiglia
It pays to have older friends! "When I was 18, my roommate was Milo Ventimiglia, who was 28 at the time," Gossip Girl's Badgley told Bullet magazine. "I used to borrow his ID to get into bars. I've still got it somewhere."