Flashback! Stars Who Stopped by The O.C.In honor of the hit show's 10th anniversary, see which soon-to-be-famous faces hit the beach with Mischa Barton, Benjamin McKenzie, Rachel Bilson and Adam Brody

OLIVIA WILDE

Before she made plans to wed Jason Sudeikis, Wilde hooked up with both Seth Cohen (Brody) and Marissa Cooper (Barton) as bisexual vixen Alex Kelly, who helped run local hot spot the Bait Shop. When creator Josh Schwartz offered Wilde the role, she accepted, joking (as recalled to Allure), "But only if I get to make out with Mischa Barton.' And he said, 'Who told you?'"