Peter Gallagher Sandy Cohen Actor Ben McKenzie Ryan Atwood Actor Kelly Rowan Kirsten Cohen Actor Adam Brody Seth Cohen Actor Mischa Barton Actor Tate Donovan Actor Melinda Clarke Julie Cooper Actor Chris Carmack Actor Rachel Bilson Summer Roberts Actor Alan Dale Actor Daphne Ashbrook Guest Star Kim Oja Guest Star Francis Capra Guest Star Adam Grimes Guest Star Josh Kloss Guest Star Devin Mills Guest Star Kimberly Stanphill Guest Star Erica Toffel Guest Star Lisa K. Wyatt Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer