Jack Black

Zachary Levi

Grown Up Stan

Jack Black

Stan

Milo Coy

Dad

Bill Wise

Josh Wiggins

Glen Powell

Mom

Lee Eddy

Lee Eddy

Josh Wiggins

Vicky

Natalie L'Amoreaux

Grandmother #2

Jennifer Griffin

Jana

Jessica Brynn Cohen

Greg

Sam Chipman

Pinball Buyer

Samuel Davis

Stephanie

Danielle Guilbot

SIMSUP

Nick Stevenson

Grandmother #1

Mona Lee Fultz

Grandfather

Larry Jack Dotson

AstroWorld Kid (uncredited)

Keslee Blalock

Steve Bales

Brian Villalobos

Sam 'The Rocket Man'

Holt Boggs

Mr. St. George

David DeLao

Tony

Reese Armstrong

Music Class Teacher

Natalie Joy

Science Teacher

Suzanne Deal Booth

Principal Cowan

Chris Olson

Lisa (uncredited)

Avery Joy Davis

Hoodlum (uncredited)

Christian Moran

NASA Controlman (uncredited)

Nicholas Andrew Rice

Jack

Chris Zurcher

NASA Mission Control

John Kaler

Neighbor Kid

Gedeon Bring

Service Station Attendant (uncredited)

Brent A. Riggs

SIMSUP (uncredited)

P. Michael Hayes II

Neighborhood kid

Michael Garza

Neighborhood kid

Joey Garza

Neighbor Friend

Wyatt Lindner

Neighborhood Kid

Andrew N Sears

Abominable Snowman

William Carroll

Laughing Boy (uncredited)

Flint Nattinger

Neighborhood Kid

Brady Samman

Neighborhood kid

Dustin Johnson

Exterminator

Rodney Becker

Self (Archival Audio)

Walter Cronkite

Self (Archival Audio)

John F. Kennedy

Theater Patron

Stan Taylor

Self (Archival Audio)

Richard Nixon

Self (Archival Audio)

Neil Armstrong

Self (Archival Audio)

Buzz Aldrin

Self (Archival Audio)

Janis Joplin