Mischa Barton, 22, was charged with DUI and possession of pot stemming from her December 27, 2007 arrest after she was stopped on a traffic violation in West Hollywood.
She was charged with driving under the influence, driving while having a blood-alcohol level of 0.08 percent or higher, driving without a valid license and possession of 28.5 grams or less of marijuana.
Barton is an actress, best known for her role in "The O.C.," "Hexxx," "Virgin Territory" and "Closing the Ring."