Dylan O'Brien

Character: Thomas

Kaya Scodelario

Character: Teresa Agnes

Thomas Brodie-Sangster

Character: Newt

Giancarlo Esposito

Character: Jorge

Ki Hong Lee

Character: Minho

Dexter Darden

Character: Frypan

Rosa Salazar

Character: Brenda

Patricia Clarkson

Character: Ava Paige

Aidan Gillen

Character: Janson

Barry Pepper

Character: Vince

Nathalie Emmanuel

Character: Harriet

Alexander Flores

Character: Winston

Jacob Lofland

Character: Aris Jones

Lili Taylor

Character: Mary Cooper

Alan Tudyk

Character: Blondie

Terry Dale Parks

Character: Carl (Masked Man)

Kathryn Smith-McGlynn

Character: Dr. Crawford

Matthew T. Metzler

Character: Barkley

Jenny Gabrielle

Character: Ponytail

David House

Character: Soldier

Lora Martinez-Cunningham

Character: Thomas' Mother

Luke Gallegos

Character: Young Thomas

Shawn Prince

Character: David

Jeremy Becerra

Character: Riley

Matthew Page

Character: Harold (Soldier)

Alex Knight

Character: Aide

Marc Comstock

Character: Med Tech

John Trejo

Character: M3 Soldier

Katherine McNamara

Character: Sonya

Tatanka Means

Character: Joe

Ryan Jason Cook

Character: Nurse

James Burnett

Character: Rebel Sentry

Morse Bicknell

Character: Doctor

Adriana Acosta

Character: Glader (uncredited)

Brian Barela

Character: Bunker Soldier (uncredited)

Laramie Cooley

Character: Abigail (uncredited)

Jetto Dorsainville

Character: WCKD / Bunker Militia (uncredited)

Andrea Good

Character: Ash People (uncredited)

Carma Harvey

Character: Scavenger (uncredited)

Gary Hood

Character: Glader (uncredited)

Keith Jardine

Character: Scavenger Guard (Jim) (uncredited)

Jess King

Character: WCKD Soldier (uncredited)

Martin Palmer

Character: Rave Party Guest (uncredited)

Frank Powers

Character: Soldier (uncredited)

Ben Pronsky

Character: Additional Voices (voice) (uncredited)

James Tyler Robinson

Character: Glader (uncredited)

Gonzalo Robles

Character: Hazmat Soldier (uncredited)

Bryce Romero

Character: Jack (uncredited)

Diego Romero

Character: Scavenger Guard (uncredited)

J. Nathan Simmons

Character: Ash Mob Evacuee (uncredited)

Kaelee Vigil

Character: Civilian (uncredited)

Alexander Wagenman

Character: Kid on Train (uncredited)

Richard Daniel Williams

Character: Right Arm Militia (uncredited)

John Christian Love

Character: Surveillance Room Attendant

Kelly V. Lucio

Character: Glader / Rescued Glader (uncredited)

Tureygua Inaru

Character: Glader