The O.C. Cast: Then & NowSee how Mischa Barton, Adam Brody, Rachel Bilson and more have changed since their days in Newport Beach


Then: Bilson sported bikini after bikini as Summer Roberts, the popular girl who – you called it! – fell for the video game nerd (Adam Brody's Seth Cohen). Off camera, Bilson and Brody took their relationship beyond the Newport Beach, dating from 2003 until 2006.
Now: She's moved from Orange County to Bluebell, Ala., where she plays displaced New Yorker Dr. Zoe Hart on The CW's Hart of Dixie. Although Bilson never reunited with her Summer love, she's found her own personal lifeguard in beau Hayden Christensen.