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 Samaire Armstrong Guest Star Navi Rawat Guest Star Melinda Clarke Julie Cooper Actor Chris Carmack Actor Rachel Bilson Summer Roberts Actor Alan Dale Actor Amanda Righetti Guest Star Sage Kirkpatrick Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer