LOS ANGELES, California (X17online) - Mischa Barton plead no contest today to DUI charges stemming from her December 27 arrest and as a result, the actress was put on three years' probation.

The Los Angeles County Superior Court confirmed that Barton, 22, is also required to attend a three month alcohol education program. Additionally, Barton was fined approximately $1600 and as a part of her plea; the marijuana possession charges were dropped.

Barton, who is best known for her role as Marissa on The OC, was not present at the hearing.