Rachel Sarah Bilson (born August 25, 1981) 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 drama 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 action/sci-fi Jumper.
Bilson's first film role was in The Last Kiss, a romantic comedy-drama also starring Zach Braff and Jacinda Barrett. In the film, which opened on September 15, 2006, Bilson plays a college student who seduces Braff's character. Bilson had long wanted to work with Braff, having admired the film Garden State, which he directed and starred in. A body double was used for the film's sexual scene between Bilson and Braff's characters, as Bilson specified that she "feel[s] really strong[ly]" about not appearing in a nude scene. One review of the film noted that Bilson played the role with "surprising depth", although another critic described her role as "Glenn Close in Fatal Attraction as an airhead valley girl with a hot bod".