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 Autumn Reeser Taylor Townsend Guest Star Ryan Donowho Guest Star Johnny Lewis Guest Star Diego Wallraff Guest Star Tom Wright Guest Star Leslie Stevens Guest Star Nancy Linari Guest Star Kimberly Atkinson Guest Star Sven Holmberg Guest Star John H Barry Guest Star Evey Kim Guest Star Chrissy Crook Guest Star Tate Donovan Guest Star Logan Marshall-Green Guest Star Billy Salvadore Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer