X+Y

True genius comes from opening your heart.

A socially awkward teenage math prodigy finds new confidence and new friendships when he lands a spot on the British squad at the International Mathematics Olympiad.

Drama

Asa Butterfield

(Nathan Ellis)

Rafe Spall

(Martin Humphreys)

Sally Hawkins

(Julie Ellis)

Eddie Marsan

(Richard)

Jo Yang

(Zhang Mei)

Alex Lawther

(Isaac Cooper)

Alexa Davies

(Rebecca Dunn)

Martin McCann

(Michael Ellis)

Orion Lee

(Deng Laoshi)

Jake Davies

(Luke Shelton)

Paul J. Dove

(John)

Percelle Ascott

(Ben Morgan)

Christina Low

(IMO Contestant)

Edward Baker-Close

(Nathan Ellis (9 yrs))

Suraj Rattu

(Pav Kamdar)

Jamie Ballard

(Headmaster)

Clare Burt

(Doctor)

Adam Foster

(Paediatrician)

Lee Zhuo Zhao

(Li Jing)

Shannon Beer

(Caz)

Tasha Connor

(Jessie)

Bo-Han Huang

(Luke's Buddy)

Song-Hung Chang

(Employee)

Lawrence Jeffries

(Schoolboy)

Ciaran Wakefield

(Schoolboy)