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 Ruth Williamson Guest Star Drew Fuller Guest Star Ashley Hartman Guest Star Alison Simpson Guest Star Barry Wiggins Guest Star Bradley Stryker Guest Star Camille Mana Guest Star Christine Romeo Guest Star Collin Stark Guest Star Josh Waters Guest Star Kimberly Stanphill Guest Star Larry Anderson Guest Star Marisa Theodore Guest Star Ron Del Barrio Guest Star Shailene Woodley Guest Star Todd Sherry Guest Star Jen MacNeil Guest Star Memi West Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer