Jared Gilman as Sam Shakusky

Kara Hayward as Suzy Bishop

Bruce Willis as Captain Sharp

Edward Norton as Scout Master Ward

Bill Murray as Mr. Bishop

Frances McDormand as Mrs. Bishop

Tilda Swinton as Social Services

Jason Schwartzman as Cousin Ben

Bob Balaban as The Narrator

Lucas Hedges as Redford

Charlie Kilgore as Lazy Eye

Harvey Keitel as Commander Pierce

Chandler Frantz as Gadge

Gabriel Rush as Skotak

Seamus Davey-Fitzpatrick as Roosevelt

Andreas Sheikh as Panagle

Rob H. Campbell as Deluca

L.J. Foley as Izod

Tommy Nelson as Nickleby

Larry Pine as Mr. Billingsley

Marianna Bassham as Becky

Neal Huff as Jed

Eric Chase Anderson as Secretary McIntire

Jake Ryan as Lionel

Tanner Flood as Murray

Wyatt Ralff as Rudy

Max Derderian as Chef

Hugo DeAscentis as Edgar

Liz Callahan as Mrs. Billingsley

James Demler as Noah

Christine Noel as Noah's Wife

Jean-Michael Pion as Ham

John Peet as Junior Khaki Scout Master

Carolyn Pickman as Mrs. Lynn

Ada-Nicole Sanger as Sparrow

Isabella Guinness as Owl

Violet Guinness as Bittern

Caris Yeoman as Curlew

Lily Tiger McEnerney as Dove

Kevin DeCoste as Morse Code Khaki Scout

Tyler Metivier as Bugle Boy Scout

Cooper Murray as Indian Chief Khaki Scout

Coledyn Garrow as Trampoline Khaki Scout

Ben Haffner as Archery Khaki Scout

Michael Malvesti as B-B-Q Khaki Scout

Richie Conant as Fort Lebanon Khaki Scout

Johnathon Deneault as Fort Lebanon Khaki Scout

Jack Lescoulie as Fort Lebanon Khaki Scout

Preston Hatch as Fort Lebanon Khaki Scout

Alex Milne as Fort Lebanon Khaki Scout

Jordan Puzzo as Fort Lebanon Khaki Scout

Steve Smith as Weather Man (voice)

Dakota Pimentel as Acolyte

Roman Keitel as Acolyte's Assistant

Derek Sardella as Pigeon Scout

John Franchi as Play Attendee (uncredited)

Al Conti as Townsman (uncredited)