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 Paul Wesley Guest Star Kim Oja Guest Star Ashley Hartman Guest Star Kimberly Stanphill Guest Star Devin Mills Guest Star Robert Guthrie Guest Star Michelle Dominique Guest Star Chase Fleming Guest Star Jenilee Reyes Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer