Reeser, who's 25, has been acting since she was seven and has made guest appearances on shows such as Grounded for Life, George Lopez, and MTV's Undressed, among others. Her most recent television gig was a recurring role on ABC's Complete Savages, a comedy about a single father, which was pulled from the air earlier this year.
Reeser comes to The O.C. as new-girl-in-school Taylor Townsend, who will lock horns with Summer for control of the Orange County teen social scene. The beloved series' sordid plot is sure to thicken in its third season, which begins on Thursday, September 8, at 8:00pm ET/PT, 7:00pm CT.