Peter Gallagher Sandy Cohen Actor Benjamin McKenzie Ryan Atwood Actor Kelly Rowan Kirsten Cohen Actor Adam Brody Seth Cohen Actor Mischa Barton Actor Tate Donovan Actor Samaire Armstrong Guest Star Alan Dale Guest Star Taylor Handley Guest Star Amanda Righetti Guest Star Melinda Clarke Julie Cooper Actor Rachel Bilson Summer Roberts Actor Chris Carmack Guest Star Michael Reilly Burke Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer