Peter Gallagher Sandy Cohen Actor Ben McKenzie Ryan Atwood Actor Kelly Rowan Kirsten Cohen Actor Adam Brody Seth Cohen Actor Mischa Barton Actor Rachel Bilson Summer Roberts Actor Melinda Clarke Julie Cooper Actor Michael Nouri Guest Star Cam Gigandet Guest Star Samaire Armstrong Guest Star Navi Rawat Guest Star Lisa Tucker Guest Star Autumn Reeser Taylor Townsend Guest Star Chase Kim Guest Star Justin Chon Guest Star AnnaLynne McCord Guest Star Jennifer Bronstein Guest Star Tyson Chambers Guest Star Janet Linn Guest Star Susane E. Lee Guest Star Aurelie Kyinn Guest Star Josh Schwartz Executive Producer McG Executive Producer Robert DeLaurentiis Executive Producer