Minho
Ki Hong Lee
Thomas
Dylan O'Brien
Teresa Agnes
Kaya Scodelario
Teresa
Kaya Scodelario
Newt
Thomas Brodie-Sangster
Jorge
Giancarlo Esposito
Frypan
Dexter Darden
Janson
Aidan Gillen
Vince
Barry Pepper
Winston
Alexander Flores
Brenda
Rosa Salazar
Aris Jones
Jacob Lofland
Mary Cooper
Lili Taylor
Ava Paige
Patricia Clarkson
Harriet
Nathalie Emmanuel
Blondie
Alan Tudyk
Carl (Masked Man)
Terry Dale Parks
Dr. Crawford
Kathryn Smith-McGlynn
Ponytail
Jenny Gabrielle
Dr. Crawford
Kathryn Smith-McGlynn
Soldier
David House
Barkley
Matt Metzler
Thomas' Mother
Lora Martinez-Cunningham
Young Thomas
Luke Gallegos
David
Shawn Prince
Riley
Jeremy Becerra
Young Thomas
Luke Gallegos
Med Tech
Marc Comstock
M3 Soldier
John Trejo
Joe
Tatanka Means
Harold (Soldier)
Matthew Page
Aide
Alex Knight
Nurse
Ryan Jason Cook
Rebel Sentry
James Burnett
Doctor
Morse Bicknell
Sonya
Katherine McNamara
WCKD / Bunker Militia (uncredited)
Jetto Dorsainville
Ash People (uncredited)
Andrea Good
Scavenger Guard (Jim) (uncredited)
Keith Jardine
WCKD
Jetto Dorsainville
Soldier (uncredited)
Frank Powers
Surveillance Room Attendant
Brandon K. Hampton
Additional Voices (voice) (uncredited)
Ben Pronsky
Glader
Kelly V. Lucio
Hazmat Soldier (uncredited)
Gonzalo Robles
Jack (uncredited)
Bryce Romero
Ash Mob Evacuee (uncredited)
J. Nathan Simmons
Civilian (uncredited)
Kaelee Vigil
Kid on Train (uncredited)
Alexander Wagenman