Mila Kunis Rachel Jansen
Paul Rudd Chuck
Jason Bateman Animal Instincts Detective
William Baldwin Detective Hunter Rush
Kristen Bell Sarah Marshall
Kristen Wiig Yoga Instructor
Ahna O'Reilly Leslie
Jason Segel Screenplay, Peter Bretter
Jonah Hill Matthew Van Der Wyk
Bill Hader Brian Bretter
Chuck 'Chaz' Hosack Stunts
D. Scott Easton Unit Production Manager
George H. Anderson Supervising Sound Editor
Kirk Fox Mixer
Jack McBrayer Darald
Da'Vone McDonald Dwayne
June Diane Raphael Ann
Maria Thayer Wyoma
T. Daniel Scaringi Key Grip
Judd Apatow Producer
Steve Landesberg Dr. Rosenbaum
Russell Brand Aldous Snow
Peter Gray Lewis Suspect on Animal Instincts
Gary Burritt Negative Cutter
Branscombe Richmond Keoki
Desne J. Holland Makeup Artist
Carla Gallo Gag Me Girl
Trula M. Marcus Lawyer on Crime Scene
Taylor Wily Kemo
Nicholas Stoller Director
Cynthia Lamontagne Female Bartender
Max Alexander Big Dracula Head
Kala Alexander Greg
Thom 'Coach' Ehle Dolby Consultant
Murray Miller Photographer
Tim Trella Stunt Coordinator, Second Unit Director
Cynthia C. Rebman Set Dresser
Gedde Watanabe Hotel Manager
Rodney Rothman Executive Producer
Jeanne McCarthy Casting
Goro Koyama Foley Artist
Brian Keaulana Stunts
Tanisha Harper Model
James Matheny Dialogue Editor
Richard Vane Executive Producer
Greg Zimmerman ADR Recordist
Russ T. Alsobrook Director of Photography
Rich King Extras Casting
Andy Malcolm Foley Artist
Greg Steele ADR Mixer
Jesse Heiman Theater Audience Member (uncredited), Stand In
Phil Dagort Set Designer
Larry Kemp Dialogue Editor
Liz Cackowski Liz Bretter
Nicole Abellera Hallman Casting Associate
Danny Wynands Stunts
Gary Marcus First Assistant Director
Casey Hotchkiss Camera Operator
Michael Trisler Stunts
Tammy Fearing ADR Supervisor
Grace Lambert Pyke Key Costumer
Shauna Robertson Producer
Leslie Woo Casting Assistant
Tom Rebber Transportation Captain
Curtis Bradford Gaffer
John H. Samson Construction Coordinator
Vickie Mynes Hairstylist
Jeff Graham First Assistant "B" Camera
Chet Leonard Cableman
Dawn Massaro Second Assistant Director
Cindy Marty Sound Effects Editor
Billy Bush Billy Bush (Himself)