From the NY POST:

MISCHA Barton — the formerly willowy star of “The O.C.” — was taken away by police and hospitalized under California’s involuntary psychiatric-hold law just hours before she was due to fly to New York for the premiere of her movie, “Homecoming”

Police were called to Barton’s Los Angeles home at 3 p.m. Wednesday to assist her with a “medical issue,” according to “Access Hollywood.”

Cops took her to Cedars-Sinai Medical Center, where she was hospitalized under Section 5150 of the California Welfare & Institutions Code, which allows authorities to hold a person for up to 72 hours if they present a danger to themselves or to others.

Barton, 23, looked bloated and almost unrecognizable at a public appearance last week, which her reps blamed on the removal of a wisdom tooth.

The once-scary-skinny starlet was arrested for DUI and marijuana possession in LA after driving in two lanes during a break from the movie’s location work in Pittsburgh last year. She later checked into rehab.

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