Mischa Barton has been arrested for misdemeanor driving under the influence after being stopped in West Hollywood.
Los Angeles County sheriff's officials say the former star of "The O.C." was taken into custody at about 2:45 a.m. Thursday after deputies saw her car straddling two lanes of traffic and failing to signal while making a turn.
The 21-year-old actress is being held in a West Hollywood jail on $10,000 (euro6,900) bail. She was arrested for investigation of misdemeanor driving under the influence and driving without a license.
Calls to her manager and publicist were not immediately returned.
Barton played Marissa Cooper on "The O.C." from 2003 to 2006.
Her arrest was first reported by Hollyscoop.com.