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 Cassidy Guest Star Logan Marshall-Green Guest Star Nikki Griffin Guest Star Marguerite Moreau Guest Star Todd Bosley Guest Star Burnadean Jones Guest Star Carrie Ann Nagy Guest Star Robb Reesman Guest Star Matthew J. Williamson Guest Star Jesse Heiman Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer Michael Fresco Director