The Debut (The O.C.) - Cast

Cast

The initial season had nine major roles receive star billing. Benjamin McKenzie portrayed protagonist Ryan Atwood, a troubled teenager who is thrust into the wealthy lifestyle of Newport. Mischa Barton played the girl next door, Marissa Cooper, with Tate Donovan starring as her financially troubled father Jimmy. Adam Brody acted as geeky ostracized teenager Seth Cohen with Kelly Rowan playing his mother Kirsten, the powerful businesswoman, and Peter Gallagher portraying his father, Sandy, a public defense attorney. Chris Carmack portrayed Marissa's boyfriend Luke Ward. Originally only guest stars, Melinda Clarke starred as Marissa's mother, Julie Cooper, and Rachel Bilson played Summer Roberts, best friend to Marissa and Seth's object of affection. Both gained contracts to the main cast list after thirteen episodes.

Numerous supporting characters were given expansive and recurring appearances in the progressive storyline, including Samaire Armstrong as Anna Stern, Alan Dale as wealthy businessman and father of Kirstin, Caleb Nichol. Taylor Handley played Oliver Trask, a psychotic character who viewers loved to hate. Amanda Righetti starred as Kirstin's younger sister Hailey Nichol. Navi Rawat played Theresa Diaz, childhood sweetheart of Ryan. Bonnie Somerville acted as Rachel Hoffman, a former work colleague of Sandy, and Ashley Hartman portrayed Holly Fischer a friend of Marissa and Summer.

Other guest stars in recurring roles include Linda Lavin as Nana Cohen, Daphne Ashbrook as Ryan's mother Dawn and Michael Nouri as Summer's father Neil. Actors Bradley Stryker, as Ryan's brother Trey, and Shailene Woodley, as Marissa's younger sister Kaitlin, were both only guest stars at this point. However both these characters, portrayed by different actors, would return to a larger role in later seasons.