Adam Sandler character Michael Newman
Kate Beckinsale character Donna Newman
Christopher Walken character Morty
David Hasselhoff character Ammer
Henry Winkler character Ted Newman
Julie Kavner character Trudy Newman
Nick Swardson character Bed, Bath & Beyond Guy
Sean Astin character Bill
Jenae Altschwager character Judy
Billy Slaughter character Newman Employee
Joseph Castanon character Ben Newman at 7 years old
Jonah Hill character Ben Newman at 17 years old
Jake Hoffman character Ben Newman at 22-30 years old
Tatum McCann character Samantha Newman at 5 years old
Lorraine Nicholson character Samantha Newman at 14 years old
Katie Cassidy character Samantha Newman at 27 years old
Cheyenne Alexis Dean character Samantha's Friend
Cameron Monaghan character Kevin O'Doyle
Jennifer Coolidge character Janine
Rachel Dratch character Alice / Alan
Sid Ganis character Dr. Bergman
Sophie Monk character Stacy
Michelle Lombardo character Linda
Jana Kramer character Julie Newman
Lily Mo Sheen character Lakeside Camp Girl
Willy Goldstein character Lakeside Camp Boy
Carolyn Hennesy character Kathy O'Doyle
Rob Schneider character Prince Habeeboo
Iryna Blokhina character Jogger
Katheryn Cain character Kirsten
Frank Coraci character Male Nurse
Tim Herlihy character Doctor
Brianna Davis character Firecracker Teen
Dolores O'Riordan character Singer
Sally Insul character Aunt Peggy
Theresa Barrera character Susie (uncredited)
Terry Crews character Singing Driver (uncredited)
Elizabeth DeCicco character Hot Assistant (uncredited)
Tracy Britton character Office Worker (uncredited)
Abra Chouinard character Hot Employee (uncredited)
Howard Fong character Ping Woo's Grandfather (uncredited)
Jorge Garcia character Ammer in SAP scene (uncredited)
James Earl Jones character Narrator of Michael's Past (uncredited)
Jason Sandler character Best Man (uncredited)
Celeste Thorson character Punk Chick (uncredited)
Lana Titov character Wedding Guest (uncredited)
