Cillian Murphy
as Jim

Naomie Harris
as Selena

Brendan Gleeson
as Frank

Megan Burns
as Hannah

Christopher Eccleston
as Major Henry West

Noah Huntley
as Mark

Luke Mably
as Private Clifton

Stuart McQuarrie
as Seargent Farrell

Ricci Harnett
as Corporal Mitchell

Leo Bill
as Private Jones

Junior Laniyan
as Private Bell

Ray Panthaki
as Private Bedford

Sanjay Rambaruth
as Private Davis

Marvin Campbell
as Private Mailer

Christopher Dunne
as Jim's Father

Emma Hitching
as Jim's Mother

Alex Palmer
as Activist

Bindu De Stoppani
as Activist

Jukka Hiltunen
as Activist

David Schneider
as Scientist

Alexander Delamere
as Mr. Bridges

Kim McGarrity
as Mr. Bridges' Daughter

Toby Sedgwick
as Infected Priest

Justin Hackney
as Infected Kid

Adrian Christopher
as Featured Infected

Richard Dwyer
as Featured Infected

Nick Ewans
as Featured Infected

Terry John
as Featured Infected

Paul Kasey
as Featured Infected

Sebastian Knapp
as Featured Infected

Nicholas James Lewis
as Featured Infected

Jenni Lush
as Featured Infected

Tristan Matthiae
as Featured Infected

Jeffrey Rann
as Featured Infected

Joelle Simpson
as Featured Infected

Al Stokes
as Featured Infected

Steen Young
as Featured Infected