After her arrest early yesterday, Mischa Barton has been formally charged with misdemeanor DUI, possession of a controlled substance and possession of marijuana, according to Los Angeles Sheriff's Deputy Sgt. John Hocking.

The skinny actress, 21, who was pulled over around 3 a.m., has been ordered to appear in Beverly Hills, Calif., Court for arraignment on February 28, 2008.

Mischa Barton blazes up a phat J in this classic file photo.

The cops spotted Mischa Barton straddling two lanes of traffic and failing to signal while making a turn. Barton was arrested after being stopped by police and failing a field sobriety test, and subsequently held in custody on $10,000 bail.

Police released Barton around 10:05 a.m. Thursday. Her mother picked her up in a black Mercedes and carried Mischa's paperwork. The former star of The OC left the station with arms crossed, and face covered with a scarf. She tried to lay down in the back of the car. She was given a police escort so nobody would follow her.