Actress Mischa Barton, 21, was arrested early Thursday morning in West Hollywood for driving under influence.

The former “O.C.” star was also detained for possession of an illegal narcotic and driving with an invalid license, according to Eonline.com.

According to a statement released by L.A. County Sheriff Department, around 2:46 a.m. Barton was pulled over at the corner of La Cienega and Santa Monica boulevards after she was seen driving her Range Rover on two lanes and failing to signal when she made a turn.

The statement said: “During Ms. Barton's detention, it was determined that she was an unlicensed driver and was driving while under the influence of an alcoholic beverage. Ms. Barton was arrested and transported to West Hollywood Sheriff's station where the booking process was completed without incident,” People reports.

At 3:10 a.m. she was arrested, according to an arrest report acquired by TMZ.

After 10 a.m. Barton was released for a $10,000 bail, according to a West Hollywood deputy.

At first the police said that she was also arrested for possession of illegal narcotics, but no details were available yet.

Barton’s representative didn’t make any comment yet.

Barton is known for her role of bad girl Marissa Cooper on the “O.C.” series. Since she left the TV drama she has been focusing on movies. She already has three roles in upcoming films: “Virgin Territory”, “St. Trinian’s” and “Closing the Ring.”

She is scheduled to host the opening of CatHouse, the new restaurant and lounge in Las Vegas this weekend.