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 Tate Donovan Guest Star Logan Marshall-Green Guest Star Amanda Righetti Guest Star Nikki Griffin Guest Star Garrett M. Brown Guest Star Darion Basco Guest Star Doug Burch Guest Star Kathleen M. Darcy Guest Star David DiBrienza Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer Ian Toynton Director