Kate Beckinsale Donna Newman
Adam Sandler Producer, Michael Newman
Jennifer Coolidge Janine
Christopher Walken Morty
Sean Astin Bill
James Earl Jones Narrator of Michael's Past (voice) (uncredited)
Henry Winkler Ted
Cameron Monaghan Kevin O'Doyle
Jonah Hill Ben at 17 years old
Rob Schneider Prince Habeeboo (uncredited)
Katie Cassidy Samantha at 27 years old
Terry Crews Singing Driver (uncredited)
Rachel Dratch Alice / Alan
J.J. Perry Stunts
Theresa Barrera Susie (uncredited)
John Collins Assistant Art Director
Neal H. Moritz Producer
Ahmad Jordan Habeeboo Entourage
Daryl Kass Unit Production Manager
David Hasselhoff Ammer
Matthew P. Hanson Assistant Sound Editor
J.J. George Music Editor
Nick Swardson Bed, Bath & Beyond Guy
Elmo Weber Supervising Sound Editor
Gary A. Hecker Foley Artist
Julie Kavner Trudy
Jorge Garcia Ammer in SAP scene (uncredited)
Craig Riley Jr. Best Boy Grip
J. Mark Donaldson Stunts
David C. Potter Leadman
Charlie Scott Jr. Craft Service
Cosmas A. Demetriou Set Designer
Blake Clark Roy (uncredited)
Peter G. Travers Visual Effects Supervisor
Jana Kramer Julie
Timothy S. Wiles Property Master
Carolyn Hennesy Kathy O'Doyle
David V. Butler Dialogue Editor
Marcei A. Brubaker Brown Second Assistant Director
Pamela Lynn Thomas Casting Associate
Michael J. Broomberg Foley Artist
John C. Hartigan Special Effects Coordinator
Bill W. Benton Sound Mixer
John W. Murphy Dolly Grip
Spencer Kayden Bar Patron (uncredited)
Mark O'Keefe Producer, Writer
Michael T. Ryan Music Editor
Terry Hubbard Assistant Editor
James J. Gilson Chief Lighting Technician
Toshi Toda Watsuhita Executive
Corina C. Duran-Rabichuk Makeup Artist
Rick Baker Special Effects Makeup Artist
Jeff 'Moose' Howery Dolly Grip
Tim Herlihy Executive Producer, Doctor
Michelle Lombardo Linda
C. Michelle Woods Ex-Girlfriend (uncredited)
Dean Semler Director of Photography
Marco Khan Habeeboo Entourage
Russell Farmarco Supervising ADR Editor
Thomas J. Larsen Stunts
Rupert Gregson-Williams Original Music Composer
Paul Eliopoulos Stunt Coordinator, Stunt Double
William 'Bear' Paul Key Grip
Billy Slaughter Newman Employee (uncredited)
Steve Koren Producer, Writer
Jeffrey J. Haboush Sound Mixer
Elizabeth A. Bergman Assistant Accountant
Alireza Tanbakoochi Habeeboo Entourage
Pete von Sholly Storyboard Artist
Ann Pala Makeup Department Head
Joseph F. Brennan Boom Operator
Howard London ADR Mixer