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 Willa Holland Kaitlin Cooper Guest Star Autumn Reeser Taylor Townsend Guest Star Ryan Donowho Guest Star Michael Nouri Guest Star Johnny Lewis Guest Star Jackson Rathbone Guest Star Paula Trickey Guest Star Scott Seymour Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer