Rachel Bilson was born August 25, 1981. Rachel is an American actress. After growing up in a California show business family, she made her television debut in 2003 and subsequently became well-known for playing Summer Roberts on the prime time dramedy series The O.C. Bilson made her film debut in the 2006 film The Last Kiss, appeared as Lou on the NBC show Chuck, and starred in the 2008 thriller Jumper.