Created by Josh Schwartz, FOX's The O.C. premiered on Aug. 5, 2003 and ran for four seasons until Feb. 22, 2007. Starring Mischa Barton, Benjamin McKenzie, Adam Brody and Rachel Bilson as four teens living in the affluent community of Newport Beach, California, the primetime teen soap was broadcast in more than 50 countries and won 12 Teen Choice Awards.
Rachel Bilson: Then
Bilson's Summer Roberts was originally intended to appear in just a few episodes, but the actress charmed audiences and was soon upgraded to series regular. Throughout the show's four seasons, her character was involved in an on-and-off relationship with the adorkable Seth Cohen (Adam Brody, whom she also dated in real life). In the series finale, Summer and Seth tied the knot.