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For the first time, Mischa Barton has opened up about how her hard-partying ways led to her being committed to the psych ward in 2009. "It was a full-on breakdown," Barton said in the new issue of People magazine. "It was terrifying. Straight up out of 'Girl, Interrupted.' Story of my life." But in 2003, she was a 17-year-old newly minted "it" girl after being cast as Cali teen Marissa Cooper on "The O.C." (4/22/03) Credit: Getty Images

Mischa Barton: From 'It' Girl to Girl, Interrupted

The "O.C." alum admits her life "spiraled out of control" and that she had a "full-on breakdown" at the height of her fame.