Millie Bobby Brown

Michelle

Chris Pratt

Keats

Woody Harrelson

Mr. Peanut (voice)

Ke Huy Quan

Dr. Amherst

Giancarlo Esposito

Colonel Bradbury

Stanley Tucci

Ethan Skate

Anthony Mackie

Herman (voice)

Brian Cox

Popfly (voice)

Jenny Slate

Penny Pal (voice)

Woody Norman

Christopher

Katelin Chesna

Hospital Doctor

Adam Croasdell

Marshall

Billy Bob Thornton

(voice)

Jason Alexander

Terry Notary

Cuyle Carvin

Helen Hunt

Alan Tudyk

Christopher (voice)