Joe Locke

Charlie Spring

Kit Connor

Nick Nelson

William Gao

Tao Xu

Yasmin Finney

Elle Argent

Tobie Donovan

Isaac Henderson

Rhea Norwood

Imogen Heaney

Corinna Brown

Tara Jones

Kizzy Edgell

Darcy Olsson

Jenny Walser

Tori Spring

Cormac Hyde-Corrin

Harry Greene

Leila Khan

Sahar Zahid

Ashwin Vishwanath

Sai Verma

Evan Ovenell

Christian McBride

Araloyin Oshunremi

Otis Smith

Fisayo Akinade

Mr Ajayi

Sebastian Croft

Ben Hope

Georgina Rich

Jane Spring

Nima Taleghani

Mr Farouk

Chetna Pandya

Coach Singh

Joseph Balderrama

Julio Spring

Olivia Colman

Sarah Nelson

Bradley Riches

James McEwan, Student 3

Alan Turkington

Mr Lange

Bel Priestley

Naomi Russell

Ash Self

Felix Britten

Momo Yeung

Yan Xu

Stephen Fry

Headmaster Barnes (voice)

Jack Barton

David Nelson

Laura Hanna

Mariam Argent

Darragh Hand

Michael Holden

Isabel Adomakoh-Young

Miss Greenwood

Thibault de Montalembert

Stéphane Nelson

Rebecca Root

Principal Edwards

Annette Badland

Ivy Olsson

Hayley Atwell

Aunt Diane

Eddie Marsan

Geoff Young

Richard Stemp

Mr Budd

Zoe Molyneux

Keira the Tour Guide

Vanessa Cruickshank

Pauline Jones

Rachael Stirling

Amanda Olsson

Habib Nasib Nader

Richard Argent

Christopher Hatherall

Uncle Rich

Eliott Hameau

Classmate (uncredited)

Courtney-Jai

Courtney-Jai

Leonie Spilsbury

Miss Hyder

Frewyn Thursfield

Orchestra Girl

Jack O'Doherty

Young Nick

Livia Nelson

Young Tara

Fin Milne

Student 2

Emilie Largier

Madame Martin

Jessal Kullar-Bell

Girl 2

Hesper Holden

Tiny Girl 1

Tabitha Byron

Tiny Girl 2

Kush Mukerji

Student 1

Ella Maisy Purvis

Girl 1

David Thackeray

French Teacher

Irina Leoncio

Spanish Teacher

Phoenix Stone

Older Student

LJ Bennion

Ticket Clerk

Benjamin Cléry

Ice Cream Server

Sam Firth

Young Charlie

Eden Gough

Young Tao

Euros Lyn

Security Guard

Ethan Joseph-Robert

Alex the Artist

Baby Queen

Prom Singer

Martin Marquez

Ant Spring

Malcolm Rennie

Grandad Roger

Tamara Ustinov

Grandma Nancy

Jonathan Bailey

Jack Maddox

Riz Khan

GP

Lucy Speed

Susan Denvers

Jensen Clayden

Oliver Spring

Lara Decaro

Clara Spring

Georgina Bitmead

Esther Spring

Amber James

Producer

Catherine Bailey

Katy Newnham

Regan Shepherd

Ballet Teacher

Nkara Stephenson

Kent Tour Guide

Elliot Douglas

Leeds Tour Guide

Nicol Shaw

Alice Oseman

Girl on Train (uncredited)

Margot Pue

Katie