Club Zero

Mia Wasikowska

Miss Novak

Sidse Babett Knudsen

Miss Dorset

Amir El-Masry

Mr. Dahl

Elsa Zylberstein

Elsa's Mother

Mathieu Demy

Elsa's Father

Ksenia Devriendt

Elsa

Luke Barker

Fred

Florence Baker

Ragna

Samuel D Anderson

Ben

Gwen Currant

Helen

Amanda Lawrence

Miss Benedict

Sam Hoare

Fred's Father

Camilla Rutherford

Fred's Mother

Keeley Forsyth

Ragna's Mother

Lukas Turtur

Ragna's Father

Isabel Lamers

Doctor

Andrei Hozoc

Corbinian

Laoisha O'Callaghan

Helen's Mother (as Laisha O'Callaghan)

Sade McNichols-Thomas

Joan

Szandra Asztalos

Housekeeper

Rebecca Crankshaw

Sports Teacher