George Clooney Gov. Mike Morris Director, Actor, Screenwriter, Producer Ryan Gosling Stephen Myers Actor Philip Seymour Hoffman Paul Zara Actor Paul Giamatti Tom Duffy Actor Marisa Tomei Ida Horowicz Actor Jeffrey Wright Sen. Thompson Actor Evan Rachel Wood Molly Stearns Actor Max Minghella Ben Actor Jennifer Ehle Cindy Morris Actor Michael Mantell Sen. Pullman Actor Gregory Itzin Jack Stearns Actor Talia Akiva Beth Morris Actor Yuri Sardarov Mike Actor Bella Ivory Jenny Actor Maya Sayre Sue Actor Grant Heslov Screenwriter, Producer Beau Willimon Screenwriter Brian Oliver Producer Nigel Sinclair Executive Producer Guy East Executive Producer Stephen Pevner Executive Producer Leonardo DiCaprio Executive Producer Jennifer Davisson Killoran Executive Producer Todd Thompson Executive Producer Nina Wolarsky Executive Producer Barbara A. Hall Executive Producer Phedon Papamichael Cinematographer Sharon Seymour Production Design Stephen Mirrione Film Editing Ellen Chenoweth Casting, Casting Louise Frogley Costume Design Alexandre Desplat Original Music Chris Cornwell Art Director Maggie Martin Set Decoration