Nathan Ellis

Asa Butterfield

Martin Humphreys

Rafe Spall

Julie Ellis

Sally Hawkins

Richard

Eddie Marsan

Zhang Mei

Jo Yang

Michael Ellis

Martin McCann

Isaac Cooper

Alex Lawther

Rebecca Dunn

Alexa Davies

Luke Shelton

Jake Davies

Nathan Ellis (9 yrs)

Edward Baker-Close

Deng Laoshi

Orion Lee

John

Paul J. Dove

Ben Morgan

Percelle Ascott

Suraj Rattu

IMO Contestant

Christina Low

Headmaster

Jamie Ballard

Doctor

Clare Burt

Paediatrician

Adam Foster

Caz

Shannon Beer

Li Jing

Lee Zhuo Zhao

Jessie

Tasha Connor

Employee

Song-Hung Chang

Luke's Buddy

Bo-Han Huang

Schoolboy

Lawrence Jeffries

Schoolboy

Ciaran Wakefield