Dylan O'Brien as Joel Dawson

Jessica Henwick as Aimee

Michael Rooker as Clyde

Dan Ewing as Cap

Ariana Greenblatt as Minnow

Ellen Hollman as Dana

Tre Hale as Rocko

Pacharo Mzembe as Ray

Senie Priti as Karen

Amali Golden as Ava

Te Kohe Tuhaka as Tim

Tasneem Roc as Anna Lucia

Thomas Campbell as Anderson

Joel Pierce as Connor

Melanie Zanetti as Kala / Voice of Mav1s

Bruce Spence as Old Pete

Hazel Phillips as Janice

Miriama Smith as Maya

Andrew Buchanan as Joel's Father

Tandi Wright as Joel's Mother

Damien Garvey as Bill

Julia Johnson as Betty

Ariu Lang Sio as Roberto

Donnie Baxter as Parker

Helen Howard as Rose

Larry Cedar as Elderly Colonist (uncredited)

Tonia Renee Hammerich as Escapee (uncredited)

Keiichi Enomoto as Escaping Camper (uncredited)

Braden Lewis as Escapee

Hero as Boy

Dodge as Boy