Emilia Clarke as Sarah Connor

Jai Courtney as Kyle Reese

Arnold Schwarzenegger as Guardian / The Terminator

Jason Clarke as John Connor

Matt Smith as Alex / Skynet

J.K. Simmons as O'Brien

Lee Byung-hun as Cop / T-1000

Dayo Okeniyi as Danny Dyson

Courtney B. Vance as Miles Dyson

Michael Gladis as Lieutenant Matias

Sandrine Holt as Detective Cheung

Wayne Bastrup as Young O'Brien

Gregory Alan Williams as Detective Harding

Otto Sanchez as Detective Timmons

Matty Ferraro as Agent Janssen

Griff Furst as Agent Burke

Ian Etheridge as Skynet - 10 yrs old

Nolan Gross as Skynet - 12 / 14 yrs old

Seth Meriwether as Skynet - 18 yrs old

Afemo Omilami as Perry

Teri Wyble as Mariam

Kerry Cahill as Lt. Whitley

Mark Adam as Kyle's Dad

Kerry O'Malley as Kyle's Mom

Willa Taylor as Young Sarah

James Moses Black as Security Guard #1

Terry Dale Parks as Security Guard #2

Douglas Smith as Eric Thompson

Anthony Michael Frederick as Lead Cop

Brandon Stacy as Uniform Cop

Brett Azar as Guardian - Young / Terminator T-800

Douglas M. Griffin as Garber

Thomas Francis Murphy as Derelict

Joshua Mikel as Angry Driver

John Edward Lee as Punk

Christion Troxell as Punk

Luke Sexton as Punk

Aaron V. Williamson as Refugee / Terminator

Tony Donno as Hospital Security Guard

Ernest Wells as Garbage Man

Larry E. Lundy Jr. as Hero Guerria

Ross P. Cook as Soldier

Christopher Heskey as Soldier

Moses Munoz as Soldier

Lisa McRee as Chat Show Host

Seth Carr as Young Boy

Bryant Prince as Young Kyle

Michael D. Anglin as Guerrilla Soldier (uncredited)

John L. Armijo as San Francisco Cop #2 (uncredited)

Ari Atken as Tiburon Kid on School Bus (uncredited)

Terri Battee as Guerrilla Officer (uncredited)

Patrick Constantine Bertagnolli, Jr. as Officer Cazzuto (uncredited)

David Cleveland Brown as Guerilla Soldier (uncredited)

Carter Burch as Guerilla Soldier (uncredited)

Lori Campbell as Doctor (uncredited)

Kyle Clements as Commander Pike Sumner (uncredited)

Christopher De Stefano as Civilian (uncredited)

Matthew Gallagher as Commander Hanz (uncredited)

Victoria Greene as Doctor (uncredited)

Shawntae Hughes as Prisoner (uncredited)

Lizeth Hutchings as Guerilla Soldier (uncredited)

Jeffrey Johnson as Refugee (uncredited)

Sergio Kato as Guerrilla Officer (uncredited)

Kevin Lapham as Cyberdyne Employee (uncredited)

Justin Lebrun as Guerrilla Guard (uncredited)

Grinnell Morris as Sarah's Father (uncredited)

Bill Rainey as Doctor (uncredited)

Gus Rhodes as Cyberdyne Employee (uncredited)

Samantha Sadoff as Tiburon Kid on School Bus (uncredited)

Giovanni Silva as Soldier (uncredited)

Nathan O'Neil Smith as Officer Schanker (uncredited)

Hannah Spiros as School Girl (uncredited)

Todd T Taylor as Cop 1 (uncredited)

Erica Teeple as Tiburon Kid on School Bus (uncredited)

Dennis Thomas IV as Cyberdyne Employee (uncredited)

Edgar Leza as Detective (uncredited)