Aaron Taylor-Johnson

Jamie

Alfie Williams

Spike

Ralph Fiennes

Dr. Kelson

Jodie Comer

Isla

Jack O'Connell

Sir Jimmy Crystal

Chi Lewis-Parry

Samson

Edvin Ryding

Erik Sundqvist

Christopher Fulford

Sam

Stella Gonet

Jenny

Kim Allan

Jimmy's Mother

Sandy Batchelor

Jimmy’s Father

Geoffrey Newland

Anthony

Joe Blakemore

Dave

Celi Crossland

Pregnant Infected

Robert Rhodes

Jimmy Jimmy

Erin Kellyman

Jimmy Ink

Sam Locke

Jimmy Fox

Maura Bird

Jimmy Jones

Ghazi Al Ruffai

Jimmy Snake

Emma Laird

Jimmima

Connor Newall

Jimmy Shite

Haley Flaherty

Jimmy's Auntie

Gordon Alexander

Jonno (uncredited)

Col Needham

Dead Body #6 (Uncredited)

Kris Deedigan

Guy (uncredited)

Sienna Giblin

Girl Villager

Amy Cameron

Rosey

Rocco Haynes

Young Jimmy

Hayley Walters

Teenage Girl Villager

Peter Labas

Slow Low #1

Kat Kitchener

Slow Low #2

Jason Kuang Yao Lee

Slow Low #3

Ember Storm

Slow Low #4

Jake Grimes

Hanging Man

Chris Gregory

Berserker

Helen Rowlands

Infected Woman

Harriet Taylor

Jimmy's Cousin Delilah

Hannah Allan-Robertson

Jimmy's Sister

Annabelle Graham

Jimmy's Sister

Olivia Morley

Jimmy's Sister

Theadora Rawlings

Jimmy's Sister

Darcie Smith

Jimmy's Sister

Isla Vickers

Jimmy's Sister

Lachlan Tucker

Baby Isla

Winnow Short

Baby Isla

Olivia Grace Lee

Baby Isla

Lucas Toole

Baby Isla

Cohen Lewis Williamson

Baby Isla

Myles Woodhouse

Baby Isla

Angus Neill

Emaciated Infected (uncredited)

RuMac

Accordionist (uncredited)

Toyah Willcox

Teletubbies Narrator (voice) (archive recording) (uncredited)