Finn Cole

Character: Don Wallace

Asa Butterfield

Character: Willoughby Blake

Hermione Corfield

Character: Clemsie Lawrence

Simon Pegg

Character: Meredith Houseman

Michael Sheen

Character: The Bat

Nick Frost

Character: Woody Chapman

Tom Rhys Harries

Character: Clegg

Isabella Laughland

Character: Kay

Kit Connor

Character: Wootton

Jamie Blackley

Character: Caspar de Brunose

Margot Robbie

Character: Audrey

Jo Hartley

Character: Babs Wallace

Jane Stanness

Character: Matron

Louis Strong

Character: Smudger

Jassa Ahluwalia

Character: Yuri

Cory Chambers

Character: Bello

Alan Drake

Character: Butler

Charles Evans

Character: Mikey

Charlie Fitzherbert

Character: Tomkinson

Alhaji Fofana

Character: Chibwe

Hanako Footman

Character: Poppet

Gary Golding

Character: Hedger

Rohan Gotobed

Character: Scholar Bartlett

Nick Kellington

Character: The Beast

Alex Macqueen

Character: Lambert

Levi Masoet

Character: Dr. François

Neil Pendleton

Character: Red Dreads

Max Raphael

Character: Hargreaves

James Woodroffe

Character: Teddy Chapman

Joshua Squire

Character: Olympus Boy (uncredited)

Toby Cordes

Character: Sparta Boy (uncredited)

Ted Day

Character: Sparta Boy (uncredited)

Thomas Farrow-Tomson

Character: Sparta Boy (uncredited)

Harry Isherwood

Character: Sparta Boy (uncredited)

Aron Jackson

Character: Sparta Boy (uncredited)

Mateusz Kobylec

Character: Sparta Boy (uncredited)

Sam Redland

Character: Sparta Boy (uncredited)

Zaak Conway

Character: Tiny New Boy (uncredited)

Jack Webb

Character: Xenephon Boy (uncredited)

Ben Wheeler

Character: Xenephon Boy (uncredited)

Lee Charles

Character: Special Security (uncredited)