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 Matt Barr Guest Star Erick Avari Guest Star Alain Uy Guest Star Adam Jamal Craig Guest Star Nathanael Johnson Guest Star Taylor Tan Guest Star Amber Barretto Guest Star Dani Lennon Guest Star Sarah E Spencer Guest Star Chris Kerner Guest Star Harris Michaels Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer