James McAvoy
Bruce

Jamie Bell
Lennox

Eddie Marsan
Bladesey

Imogen Poots
Drummond

Brian McCardie
Gillman

Emun Elliott
Inglis

Gary Lewis
Gus

John Sessions
Toal

Shauna Macdonald
Carole

Jim Broadbent
Dr Rossi

Joanne Froggatt
Mary

Kate Dickie
Chrissie

Martin Compston
Gorman

Iain De Caestecker
Ocky

Shirley Henderson
Bunty

Joy McAvoy
Estelle

Jordan Young
Lexo

Pollyanna McIntosh
Size Queen

Bobby Rainsbury
Stephanie

Michael Moreland
Tramp

Therese Bradley
Madam Maisie

Zack Eisaku Niizato
Japanese Student

Robin Laing
Rent Boy

Ron Donachie
Hector

Tracy-Ann Oberman
Diana

Mitchell Mullen
Bobby

Jodie Mccallum
Dealer's Girlfriend

Jonathan Watson
Uniformed Policeman

David Soul
Punter

Natasha O'Keeffe
Anna

Sanjeev Kohli
Sunil

Neil D'Souza
Anil

Trudie Styler
Madame R Zen Ficken

Craig Garner
Dwarf (uncredited)

Emma Bryant
Jessie (uncredited)