Michael Newman

Adam Sandler

Donna Newman

Kate Beckinsale

Morty

Christopher Walken

Ammer

David Hasselhoff

Bill Rando

Sean Astin

Ted Newman

Henry Winkler

Janine

Jennifer Coolidge

Trudy Newman

Julie Kavner

Alice

Rachel Dratch

Ben at 7 years old

Joseph Castanon

Ben at 17 years old

Jonah Hill

Ben at 22-30 years old

Jake Hoffman

Stacy

Sophie Monk

Kevin O'Doyle

Cameron Monaghan

Samantha at 5 years old

Tatum McCann

Ignatius

Nate Torrence

Samantha at 14 years old

Lorraine Nicholson

Kirsten

Katheryn Cain

Samantha at 27 years old

Katie Cassidy

Susie (uncredited)

Theresa Barrera

Judy

Jenae Altschwager

Sparkling Water Guy

Erik Audé

Linda

Michelle Lombardo

Julie

Jana Kramer

Bed, Bath & Beyond Guy

Nick Swardson

Dr. Bergman

Sidney Ganis

Watsuhita Head Executive

Michael Yama

Watsuhita Executive

Mio Takada

Watsuhita Executive

Eiji Inoue

Watsuhita Executive

Toshi Toda

Ancient Executive

George K. Eguchi

Male Nurse

Frank Coraci

Doctor

Timothy P. Herlihy

Jogger

Iryna Blokhina

Doctor

Tim Herlihy

Michael at 10 Years Old

Emilio Cast

Lakeside Camp Boy

Willy Goldstein

Lakeside Camp Girl

Lily Mo Sheen

Kathy O'Doyle

Carolyn Hennesy

Samantha's Friend

Elena Patten

Samantha's Friend

Cheyenne Alexis Dean

Ping Woo

Elliot Cho

Ping Woo's Father

Alan Au

Firecracker Teen

Ryan Keiser

Firecracker Teen

Christopher Gutierrez

Firecracker Teen

Nickole Reyes

Firecracker Teen

Christopher Levy

Firecracker Teen

Brianna Davis

Firecracker Teen

Rob Jones

Firecracker Teen

Robert Jones

Habeeboo Entourage

Manish Goyal

Habeeboo Entourage

Marco Khanlian

Habeeboo Entourage

Ahmad Jordan

Habeeboo Entourage

Marco Khan

Habeeboo Entourage

Nick Hodaly

Habeeboo Entourage

Alireza Tanbakoochi

Bandleader

John Pagano

Singer

Dolores O'Riordan

Aunt Peggy

Sally Insul

Firecracker Teen

Brianne Davis

Prince Habeeboo (uncredited)

Rob Schneider

Newman Employee (uncredited)

Billy Slaughter

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

James Earl Jones

Hot Assistant (uncredited)

Elizabeth DeCicco

Hot Employee (uncredited)

Abra Chouinard

Singing Driver (uncredited)

Terry Crews

Ping Woo's Grandfather (uncredited)

Howard Fong

Ammer in SAP scene (uncredited)

Jorge Garcia

Office Worker (uncredited)

Tracy Britton

Best Man (uncredited)

Jason Sandler

Punk Chick (uncredited)

Celeste Thorson

Wedding Guest (uncredited)

Lana Titov

Lakeside Camp Boy (uncredited)

Kyle Brody

Roy (uncredited)

Blake Clark

Young Mother (uncredited)

Lowe Cunningham

Segue Guy (uncredited)

Freddie De Grate

Singer (uncredited)

Betsy Hammer

Vendor (uncredited)

Dalon Huntington

Bikini Girl (uncredited)

Jen Johnson

Bar Patron (uncredited)

Spencer Kayden

Bar Patron (uncredited)

Traycee King

Sexual Harasser (uncredited)

Karen Levine

Bar Patron (uncredited)

Anna Lunberry

Max (uncredited)

Danny McKinnon

Parking Attendant (uncredited)

Shane Ralston