Adam Brody, Rachel Bilson, Ben McKenzie and more young actors got their starts on the teen drama — but there were even more faces that would soon become familiar in the background.
The O.C. followed Ryan Atwood (McKenzie), who experiences a culture shock after moving in with Seth Cohen (Brody) and his family in the wealthy California suburb of Orange County. Though she didn’t stick around for all four seasons, Olivia Wilde was one of many memorable guest stars on the series, appearing as older love interest Alex Kelly.
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“I used to dismiss The O.C. I’d be like, ‘I did a teen soap—what an embarrᴀssment,’” the House alum told The New York Times in May 2019. “And now I think, ‘Ah, that was really formative and I’m lucky I got to do that.’”
Scroll down to see where more of The O.C.‘s most memorable guest stars are now:
