Ewan McGregor as Renton

Jonny Lee Miller as Simon

Ewen Bremner as Spud

Robert Carlyle as Begbie / Begbie's Father

Anjela Nedyalkova as Veronika

Shirley Henderson as Gail

Kelly Macdonald as Diane

Pauline Turner as June

Scot Greenan as Frank Junior

James Cosmo as Renton's Father

Irvine Welsh as Mikey Forrester

Logan Gillies as Simon (aged 9)

Ben Skelton as Renton (aged 9)

Aiden Haggarty as Spud (aged 9)

Daniel Smith as Begbie (aged 9)

Elijah Wolf as Tommy (aged 9)

Steven Robertson as Stoddart

John Kazek as Tom (Rehab Group)

Charlie Hardie as Fergus (aged 9)

Scott Aitken as Farmer

Gordon Kennedy as Tulloch

Tereza Dušková as Tourism Girl

Elek Kish as Dozo

Lewis Gribben as Dealer

Dominic Maccoll as Dealer

Calum Verrecchia as Dealer

Simon Weir as Jailhouse

Bradley Welsh as Doyle

Katie Leung as Nurse

Thierry Mabonga as Security Officer Wilson

Atta Yaqub as Medical Student

Christopher Douglas as Chris the Oracle

James McElvar as Simon (aged 20)

Connor McIndoe as Renton (aged 20)

Bryan Quinn as Man in Music Video

Ged Hanley as Social Club Band

Neil Thomson as Social Club Band

Margaret Davies as Social Club Singer

Alex Jackson as Social Club Singer

Tom Urie as Big Bear

Phil Coppola as Boxing Instructor

John Bell as Spud (aged 20)

Kyle Fitzpatrick as Fergus

Eileen Nicholas as Renton's Mother (archive footage)

Michael Shaw as Tommy (aged 20)

Kevin McKidd as Tommy (archive footage)

Lauren Lamb as Baby Dawn (archive footage)

Devon Lamb as Baby Dawn (archive footage)

Amy Manson as Woman in Club

Russell Dunsmore as Hard Guy Driver

Nebli Basani as Hardman

Edyta Szewczyk as Girl in Sauna

Fiori Miari as Girl in Sauna

Pauline Lynch as Lizzy

Christopher Mullen as Begbie (aged 20)

Hamish Haggerty as Young Renton

Daniel Jackson as Young Begbie

Svetlana Yancheva as Veronika's Mother

Emil Bonev as Veronika's Son

Blair Flucker as Club Patron (uncredited)

Adam James Johnston as Club Patron (uncredited)