Peter Gallagher Sandy Cohen Actor Ben McKenzie Ryan Atwood Actor Rachel Bilson Summer Roberts Actor Adam Brody Seth Cohen Actor Kelly Rowan Kirsten Cohen Actor Melinda Clarke Julie Cooper Actor Autumn Reeser Taylor Townsend Actor Willa Holland Kaitlin Cooper Actor Kevin Sorbo Guest Star Gary Grubbs Guest Star Brandon Quinn Guest Star Diana Gitelman Guest Star Samuel Mongiello Guest Star Jonathan Kowalsky Guest Star Aaron Ramzi Guest Star Lee Zagari Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer