Former O.C. Star Mischa Barton Arrested

Mischa Barton was arrested this morning for possible driving under the influence of alcohol and possessing marijuana.

Police saw the 21 year old actress in her vehicle straddling two lanes and failing to signal for a turn, according to a sheriff's press statement.

Police had also determined that she was an unlicensed driver and was driving while under the influence of an alcoholic beverage," the statement said.

Barton was arrested for investigation of driving under the influence of alcohol, driving without a license, possessing a controlled substance and possessing marijuana. She spent around seven hours in the West Hollywood jail before being released on $10,000 bail.

Her arrest was first reported by the Hollyscoop.com Web site