Adam Sandler

Character: Michael Newman

Kate Beckinsale

Character: Donna Newman

Christopher Walken

Character: Morty

David Hasselhoff

Character: Ammer

Henry Winkler

Character: Ted

Julie Kavner

Character: Trudy

Sean Astin

Character: Bill

Joseph Castanon

Character: Ben at 7 years old

Jonah Hill

Character: Ben at 17 years old

Jake Hoffman

Character: Ben at 22-30 years old

Tatum McCann

Character: Samantha at 5 years old

Lorraine Nicholson

Character: Samantha at 14 years old

Katie Cassidy

Character: Samantha at 27 years old

Cameron Monaghan

Character: Kevin O'Doyle

Jennifer Coolidge

Character: Janine

Rachel Dratch

Character: Alice / Alan

Sophie Monk

Character: Stacy

Michelle Lombardo

Character: Linda

Jana Kramer

Character: Julie

Nick Swardson

Character: Bed, Bath & Beyond Guy

Sidney Ganis

Character: Dr. Bergman

Michael Yama

Character: Watsuhita Head Executive

Mio Takada

Character: Watsuhita Executive

Eiji Inoue

Character: Watsuhita Executive

Toshi Toda

Character: Watsuhita Executive

George K. Eguchi

Character: Ancient Executive

Katheryn Cain

Character: Kirsten

Frank Coraci

Character: Male Nurse

Tim Herlihy

Character: Doctor

Iryna Blokhina

Character: Jogger

Emilio Cast

Character: Michael at 10 Years Old

Willy Goldstein

Character: Lakeside Camp Boy

Lily Mo Sheen

Character: Lakeside Camp Girl

Carolyn Hennesy

Character: Kathy O'Doyle

Elena Patten

Character: Samantha's Friend

Cheyenne Alexis Dean

Character: Samantha's Friend

Elliott Cho

Character: Ping Woo

Alan Au

Character: Ping Woo's Father

Ryan Keiser

Character: Firecracker Teen

Christopher Levy

Character: Firecracker Teen

Nickole Reyes

Character: Firecracker Teen

Brianna Davis

Character: Firecracker Teen

Robert Jones

Character: Firecracker Teen

Jenae Altschwager

Character: Judy

Manish Goyal

Character: Habeeboo Entourage

Marco Khan

Character: Habeeboo Entourage

Ahmad Jordan

Character: Habeeboo Entourage

Nick Hodaly

Character: Habeeboo Entourage

Alireza Tanbakoochi

Character: Habeeboo Entourage

John Pagano

Character: Bandleader

Dolores O'Riordan

Character: Singer

Sally Insul

Character: Aunt Peggy

Rob Schneider

Character: Prince Habeeboo (uncredited)

Billy Slaughter

Character: Newman Employee (uncredited)

James Earl Jones

Character: Narrator of Michael's Past (voice) (uncredited)

Theresa Barrera

Character: Susie (uncredited)

Elizabeth DeCicco

Character: Hot Assistant (uncredited)

Abra Chouinard

Character: Hot Employee (uncredited)

Terry Crews

Character: Singing Driver (uncredited)

Howard Fong

Character: Ping Woo's Grandfather (uncredited)

Jorge Garcia

Character: Ammer in SAP scene (uncredited)

Tracy Britton

Character: Office Worker (uncredited)

Jason Sandler

Character: Best Man (uncredited)

Celeste Thorson

Character: Punk Chick (uncredited)

Lana Titov

Character: Wedding Guest (uncredited)

Kyle Brody

Character: Lakeside Camp Boy (uncredited)

Blake Clark

Character: Roy (uncredited)

Lowe Cunningham

Character: Young Mother (uncredited)

Freddie De Grate

Character: Segue Guy (uncredited)

Betsy Hammer

Character: Singer (uncredited)

Dalon Huntington

Character: Vendor (uncredited)

Jen Johnson

Character: Bikini Girl (uncredited)

Spencer Kayden

Character: Bar Patron (uncredited)

Samantha Kelly

Character: Wedding Guest (uncredited)

Traycee King

Character: Bar Patron (uncredited)

Karen Levine

Character: Sexual Harasser (uncredited)

Kat Lombard

Character: Ex-Girlfriend Tamara (uncredited)

Anna Lunberry

Character: Bar Patron (uncredited)

Mark Mahoney

Character: Waiter (uncredited)

Danny McKinnon

Character: Max (uncredited)

Shane Ralston

Character: Parking Attendant (uncredited)

Alexandra Sullivan

Character: Supermodel (uncredited)

C. Michelle Woods

Character: Ex-Girlfriend (uncredited)