Kate Beckinsale Donna Newman
Christopher Walken Morty
Terry Crews Singing Driver (uncredited)
Sean Astin Bill
David Hasselhoff Ammer
Cameron Monaghan Kevin O'Doyle
Carolyn Hennesy Kathy O'Doyle
Rachel Dratch Alice / Alan
Adam Sandler Michael Newman, Producer
Jennifer Coolidge Janine
Henry Winkler Ted
Katie Cassidy Samantha at 27 years old
Rob Schneider Prince Habeeboo (uncredited)
Josh King First Assistant Director
Jonah Hill Ben at 17 years old
James Earl Jones Narrator of Michael's Past (voice) (uncredited)
Thomas Causey Production Sound Mixer
Mark Allen Sound Effects Editor
Ellen Lutter Costume Design
Jenae Altschwager Judy
Nancy Karlin Script Supervisor
Alan Au Art Direction
Joseph F. Brennan Boom Operator
Marco Khan Habeeboo Entourage
James J. Gilson Chief Lighting Technician
Elmo Weber Supervising Sound Editor
Daryl Kass Unit Production Manager
Tracy Bennett Still Photographer
Michael Dilbeck Music Supervisor
Tammy Sandler Unit Publicist
Julie Kavner Trudy
Richard Merryman "B" Camera Operator
Bill 'Kauhane' Hoyt Standby Painter
Brian Ruberg Foley Mixer
Jessica Peel Assistant Costume Designer
Jorge Garcia Ammer in SAP scene (uncredited)
Ian Fox "A" Camera Operator
John W. Murphy Dolly Grip
Lorraine Nicholson Samantha at 14 years old
William 'Bear' Paul Key Grip
Max Daniels Stunts
Lori Harris Costumer
Roger Wall Second Assistant "B" Camera
Nick Swardson Bed, Bath & Beyond Guy
Kim Heath Key Rigging Grip
Toshi Toda Watsuhita Executive
Marisa Ferrey Second Second Assistant Director
Blake Clark Roy (uncredited)
Tamara McDonough Additional Editing
J.J. Perry Stunts
Gary A. Hecker Foley Artist
Neal H. Moritz Producer
Michael H. Barnett Stunts
Jana Kramer Julie
Jim Rygiel Visual Effects Designer
Robert Jones Firecracker Teen
Pamela Lynn Thomas Casting Associate
Howard Fong Ping Woo's Grandfather (uncredited)
Steve Koren Producer, Writer
Tim Herlihy Executive Producer, Doctor
Rick Baker Special Effects Makeup Artist
Jake Hoffman Ben at 22-30 years old
Vanessa Motta Stunts
Frank Coraci Director, Male Nurse
Lily Mo Sheen Lakeside Camp Girl
Spencer Kayden Bar Patron (uncredited)
Dean Semler Director of Photography
Paul Eliopoulos Stunt Coordinator, Stunt Double
Michael Yama Watsuhita Head Executive
Marc Glassman Sound Effects Designer
Sophie Monk Stacy
Tatum McCann Samantha at 5 years old