Jeff Bridges as Kevin Flynn / Clu

Garrett Hedlund as Sam Flynn

Olivia Wilde as Quorra

Bruce Boxleitner as Alan Bradley / Tron

James Frain as Jarvis

Beau Garrett as Gem

Michael Sheen as Castor / Zuse

Serinda Swan as Siren #2

Yaya DaCosta as Siren #3

Elizabeth Mathis as Siren #4

Kis Yurij as Half Faced Man

Conrad Coates as Bartik

Ron Selmour as Chattering Homeless Man

Dan Joffre as Key Security Guard #1 - Ernie

Darren Dolynski as Young Man on Recognizer

Kofi Yiadom as Disc Opponent #2 / Black Guard

Steven Lisberger as Shaddix

Donnelly Rhodes as Grandpa Flynn

Belinda Montgomery as Grandma Flynn

Owen Best as 7 Year Old Sam Flynn

Matt Ward as Iso Boy

Zoe Fryklund as Iso Girl

Dean Redman as Light Jet Sentry

Mi-Jung Lee as Debra Chung

Christopher Logan as Nervous Program

Sheldon Yamkovy as Destitute Program

Dale Wolfe as Irv Culpepper

Joanne Wilson as Reporter #1

Catherine Lough Haggquist as Reporter #2

Thomas Bradshaw as Security Guard #2

Shafin Karim as East Indian Taxi Driver

Rob Daly as Lead Sentry

Mike Ching as Blue Gaming Program

Michael Teigen as Green Gaming Program

Brent Stait as Purple Gaming Program

Shaw Madson as Reporter #3

Amy Esterle as Young Mrs. Flynn

Cody Laudan as End of the Line Club Bouncer

Jeffrey Nordling as Richard Mackey

Christine Adams as Claire Atkinson

Kate Gajdosik as News Anchor

Jack McGee as Police Photographer

Dawn Mander as Crying Program

Michael Logie as Kevin Flynn Performance Double

John Reardon as Young Kevin Flynn / Clu Performance Double

Edie Mirman as Computer Voice (voice)

Allen Jo as Black Guard / Disc Opponent #1

Aaron Toney as Black Guard

Kim Do Nguyen as Black Guard

Patrick Sabongui as Gaming Program 1 - S

Will Erichson as Gaming Program 2 - S

Cillian Murphy as Edward Dillinger (uncredited)

Brandon Jay McLaren as Sobel (uncredited)

Thomas Bangalter as Masked DJ

Guy-Manuel de Homem-Christo as Masked DJ

Hugo Steele as End of Line Club Bouncer (uncredited)