"I started to really worry that I couldn't play this character if I didn't hurry up and mature a little," Mischa Barton said of playing Marissa Cooper Dory Jackson is a Staff Editor for PEOPLE's ...

Earlier this month, rumors surfaced that Mischa Barton had moved across the pond to her native London. Allegedly, she planned to revive her career on the West End stage, score more face-time with ...

Peter Gallagher Is Still 'Very Protective' over Mischa Barton, Who He Says He's 'So Grateful' Is 'Still Alive' The Cast of The Sixth Sense: Where Are They Now? Mischa Barton Confirms 'Complicated ...

See The O.C. cast, then and now: Here’s what happened to the stars after they bid Newport Beach farewell Peter Gallagher says he's thankful The O.C. costar Mischa Barton is 'still alive ...

The O.C.' aired for four seasons from 2003 to 2007. Mischa Barton and Rachel Bilson get emotional rewatching Marissa Cooper's death on 'The OC.' 'The O.C.' star reunited with her onscreen Cooper ...