Rachel Bilson was born August 25, 1981, in Los Angeles. Interested in acting since she was a little girl, she started working at age 7. After various theater roles in plays such as Bye Bye Birdie, The Crucible, and Once Upon a Mattress, the actress made the jump to television. She appeared in series such as 8 Simple Rules for Dating My Teenage Daughter and Buffy the Vampire Slayer. Bilson's vibrant personality and good looks made her an obvious choice to join the cast of The O.C. in 2003.