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 Melinda Clarke Julie Cooper Actor Rosalind Chao Guest Star Chris Carmack Actor Rachel Bilson Summer Roberts Actor Amanda Righetti Guest Star Alan Dale Actor Bonnie Somerville Guest Star Samaire Armstrong Guest Star Taylor Handley Guest Star Kim Oja Guest Star Josh Kloss Guest Star Navi Rawat Guest Star Ashley Hartman Guest Star Shailene Woodley Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer, Director McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer Allan Heinberg Writer Sandy Smolan Director Michael Fresco Director Patrick R. Norris Director Helen Shaver Director J.J. Philbin Writer Liz Friedman Writer