Rachel Bilson Pictures

California girl Rachel Bilson made waves in Hollywood when she played Mischa Barton’s best friend, Summer, in Fox's hit television series "The O.C." While appearing on that show, she began dating her costar and sometimes onscreen boyfriend Adam Brody. She is now engaged to her "Star Wars" costar Hayden Christensen. Check out Rachel Bilson's latest fashion photos. Rate Rachel Bilson's photos, add them to your lookbook, email them to your friends, and post them to Facebook, Twitter and MySpace.