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 Alan Dale Actor Michael Nouri Guest Star Jeff Hephner Guest Star Nikki Reed Guest Star Cam Gigandet Guest Star Autumn Reeser Taylor Townsend Guest Star Shaun Duke Moosekian Guest Star Chase Kim Guest Star Chris Kerner Guest Star Randy Vinneau Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer