Dylan O'Brien character Thomas
Kaya Scodelario character Teresa Agnes
Thomas Brodie-Sangster character Newt
Giancarlo Esposito character Jorge
Aidan Gillen character Janson
Barry Pepper character Vince
Lili Taylor character Mary Cooper
Patricia Clarkson character Ava Paige
Ki Hong Lee character Minho
Dexter Darden character Frypan
Jacob Lofland character Aris Jones
Nathalie Emmanuel character Harriet
Katherine McNamara character Sonya
Lora Martinez-Cunningham character Thomas' Mother
Rosa Salazar character Brenda
Tatanka Means character Joe
Jenny Gabrielle character Ponytail
Alan Tudyk character Blondie
Shawn Prince character David
Terry Dale Parks character Carl (Masked Man)
John Trejo character M3 Soldier
Alexander Flores character Winston
Kathryn Smith-McGlynn character Dr. Crawford
Matt Metzler character Barkley
David House character Soldier
Luke Gallegos character Young Thomas
Jeremy Becerra character Riley
Matthew Page character Harold (Soldier)
Alex Knight character Aide
Marc Comstock character Med Tech
Brandon K. Hampton character Surveillance Room Attendant
Ryan Jason Cook character Nurse
James Burnett character Rebel Sentry
Morse Bicknell character Doctor
Laramie Cooley character Abigail (uncredited)
Bryce Romero character Jack (uncredited)
Keith Jardine character Scavenger Guard (Jim) (uncredited)
John Christian Love character Surveillance Room Attendant
Adriana Acosta character Glader (uncredited)
Brian Barela character Bunker Soldier (uncredited)
Jetto Dorsainville character WCKD / Bunker Militia (uncredited)
Andrea Good character Ash People (uncredited)
Carma Harvey character Scavenger (uncredited)
Gary Hood character Glader (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)
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)
