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 Michael Nouri Guest Star Cam Gigandet Guest Star Samaire Armstrong Guest Star Navi Rawat Guest Star Willa Holland Kaitlin Cooper Guest Star Lucy Hale Guest Star Brock Kelly Guest Star Lamont Thompson Guest Star Kim Oja Guest Star Frantz Latten Guest Star Craig Susser Guest Star Ricardo Molina Guest Star Kathleen Marie Carr Guest Star Robert Micah Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer