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.


Morgan Matthews


James Graham
4 wins & 11 nominations. See more awards »





Cast overview, first billed only:
Asa Butterfield ... Nathan Ellis
Rafe Spall ... Martin Humphreys
Sally Hawkins ... Julie Ellis
Eddie Marsan ... Richard
Jo Yang ... Zhang Mei
Martin McCann ... Michael Ellis
Jake Davies ... Luke Shelton
Alex Lawther ... Isaac Cooper
Alexa Davies ... Rebecca Dunn
Orion Lee ... Deng Laoshi
Edward Baker-Close Edward Baker-Close ... Nathan Ellis (9 yrs)
Percelle Ascott ... Ben Morgan
Suraj Rattu Suraj Rattu ... Pav Kamdar
Jamie Ballard Jamie Ballard ... Headmaster
Clare Burt Clare Burt ... Doctor


In a world difficult to comprehend, Nathan struggles to connect with those around him - most of all his loving mother - but finds comfort in numbers. When Nathan is taken under the wing of unconventional and anarchic teacher, Mr. Humphreys, the pair forge an unusual friendship and Nathan's talents win him a place on the UK team at the International Mathematics Olympiad. From suburban England to bustling Taipei and back again, Nathan builds complex relationships as he is confronted by the irrational nature of love. Written by Anonymous

Plot Summary | Add Synopsis


There is no formula for love. See more »


Drama | Romance

Motion Picture Rating (MPAA)

N: Rated PG-13 for some strong language, a sexual reference, drug material and disturbing images | See all certifications »

Parents Guide:

View content advisory »

Did You Know?


One of the filming locations was High Storrs School in Sheffield, England. See more »


The announcer at the IMO says "Welcome to the 59th IMO". This will in fact take place in 2018. See more »


Julie: When somebody says they love you it means they see something in you they think is worth something... It adds value to you.
See more »


References Star Trek: The Original Series (1966) See more »


Written and performed by Keaton Henson
Published by Kobalt Music Publishing Ltd
Licensed courtesy of Sony Music Entertainment UK Ltd
See more »

User Reviews

Perhaps too gooey for its own good, there's earnesty behind and in front of the camera.
8 August 2015 | by Sergeant_TibbsSee all my reviews

Since The Curious Incident of the Dog in the Night-Time seems to be staying on the stage rather than hitting the screen, I've been curious as to when UK cinema would dig into the perspective of a kid on the autism spectrum with the same affection. Disregard the dark aspects of Haddon's novel, and X+Y has a wonderful element of bringing someone who's inherently felt like an outsider into a world where they aren't alone with math competitions. It's nice and affectionate, though dips into gooey realms of sentimentality. But despite a few insincere or extraneous moments, it gets away with it due to director Morgan Matthew's earnestness. It's definitely easy to enjoy splendid moments where the photography has a chance to show off. It does tend to romantize far too much, particularly about China and England, but it's fairly balanced though it does have a rushed pace. I'd like to say Asa Butterfield is the highlight, but Rafe Spall steals the show in a gruff sharp performance that channels his dad in a way that makes me look forward to what he's going to do next. It's great to see a little Happy-Go-Lucky reunion with reliable support from Sally Hawkins and Eddie Marson. X+Y may rely on certain clichés, but it has a confident vision when it could've been bland.


10 of 16 people found this review helpful.  Was this review helpful to you? | Report this
Review this title | See all 86 user reviews »

Frequently Asked Questions

This FAQ is empty. Add the first question.





English | Mandarin

Release Date:

11 September 2015 (USA) See more »

Also Known As:

A Brilliant Young Mind See more »


Box Office

Opening Weekend USA:

$31,408, 13 September 2015

Gross USA:


Cumulative Worldwide Gross:

See more on IMDbPro »

Company Credits

Show more on IMDbPro »

Technical Specs


Sound Mix:

Dolby Digital



Aspect Ratio:

2.35 : 1
See full technical specs »

Contribute to This Page

Recently Viewed