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 Willa Holland Kaitlin Cooper Guest Star Ryan Donowho Guest Star Michael Nouri Guest Star Jeff Hephner Guest Star Johnny Lewis Guest Star Lisa Rotondi Guest Star Stephen Markle Guest Star Kim Oja Guest Star Morena Baccarin Guest Star Tina Morasco Guest Star Mim Drew Guest Star Meredith Majors Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer