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 Michael Nouri Guest Star Cam Gigandet Guest Star Autumn Reeser Taylor Townsend Guest Star Lamont Thompson Guest Star Daphne Ashbrook Guest Star Rosalind Chao Guest Star José Zúñiga Guest Star Paula Trickey Guest Star Erin Foster Guest Star Dave Andrews Guest Star Gregory Dark Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer