Gabriel LaBelle
as Sammy Fabelman

Michelle Williams
as Mitzi Fabelman

Paul Dano
as Burt Fabelman

Seth Rogen
as Benny Loewy

Judd Hirsch
as Uncle Boris Podgorny

David Lynch
as John Ford

Jeannie Berlin
as Hadassah Fabelman

Julia Butters
as Reggie Fabelman

Keeley Karsten
as Natalie Fabelman

Sam Rechner
as Logan Hall

Mateo Zoryan Francis-DeFord
as Younger Sammy Fabelman

Chloe East
as Monica Sherwood

Isabelle Kusman
as Claudia Denning

Robin Bartlett
as Tina Schildkraut

Oakes Fegley
as Chad Thomas

Sophia Kopera
as Lisa Fabelman

Birdie Borria
as Younger Reggie Fabelman

Alina Brace
as Young Natalie Fabelman

Chandler Lovelle
as Renee

Gustavo Escobar
as Sal

Nicolas Cantu
as Hark

Cooper Dodson
as Turkey

Gabriel Bateman
as Roger

Stephen Matthew Smith
as Angelo

Lane Factor
as Dean

James Urbaniak
as Grand View High School Principal

Alex Quijano
as Grand View High School PE Coach

Kalama Epstein
as Barry

Connor Trinneer
as Phil Newhart

Greg Grunberg
as Bernie Fein

Jan Hoag
as Nona

Carlos Javier Castillo
as Camera Store Clerk

Ezra Buzzington
as Camera Store Clerk #2

Paul Chepikian
as Pinnacle Peak Owner

Brinly Marum
as Janet Benedict

Mason Bumba
as Stunt Soldier Boy

Mary M. Flynn
as Singer #1

Adriel Porter
as Singer #2

Tia Nalls
as Singer #3

Larkin Campbell
as Scout Father

Harper Dustin
as Natalie Photo Double

Crystal the Monkey
as Bennie the Monkey

Art Bonilla
as Taxi Driver (uncredited)

Meredith VanCuyk
as Student (uncredited)

Vera Myers
as Senior Classmate (uncredited)

Cody Mitchell
as Boy Scout (uncredited)

Caroline Anna-Kaye Green
as Senior Classmate (uncredited)

Rob Shiells
as Chad's Posse (uncredited)

Julyah Rose
as Theater Goer (uncredited)

Jonathan Moorwood
as Chad's Posse (uncredited)

Ari Davis
as Theatre Patron (uncredited)

Jared Becker
as Lead Guitarist (uncredited)

Kendal Evans
as Balloon Girl (uncredited)

Trang Vo
as High School Friend (uncredited)

Alejandro Fuenzalida
as Boy Scout (uncredited)

Orion Hunter
as Boy Scout (uncredited)

Samantha Rose Gomez
as Boy Scout Sibling (uncredited)

Taylor Stone
as Senior Classmate (uncredited)

Sarah Hamilton
as Senior Classmate (uncredited)

Paige Locke
as Cheerleader (uncredited)

Marissa McBride
as Senior Classmate (uncredited)

Malachi Mickelonis
as Student (uncredited)

Max David Weinberg
as Student (uncredited)

Cameron Hennings
as Student (uncredited)

Nicole Alicia Xavier
as Sammy’s Classmate (uncredited)