Heath Ledger
as Ennis Del Mar

Jake Gyllenhaal
as Jack Twist

Michelle Williams
as Alma Beers

Anne Hathaway
as Lureen Newsome

Randy Quaid
as Joe Aguirre

Linda Cardellini
as Cassie Cartwright

Anna Faris
as Lashawn Malone

David Harbour
as Randall Malone

Roberta Maxwell
as Jack's Mother

Kate Mara
as Alma Del Mar Jr. (age 19)

Peter McRobbie
as John Twist

Graham Beckel
as L.D. Newsome

Mary Liboiron
as Fayette Newsome

Scott Michael Campbell
as Monroe

Marty Antonini
as Timmy

David Trimble
as Basque

Larry Reese
as Jolly Minister

Valerie Planche
as Waitress

Victor Reyes
as Chilean Sheepherder #1

Lachlan Mackintosh
as Chilean Sheepherder #2

Tom Carey
as Rodeo Clown

Don Bland
as Biker #1

Steven Cree Molison
as Biker #2

Duval Lang
as Announcer

Dan McDougall
as Bartender #1

Dean Barrett
as Bartender #2

Kade Phillips
as Ennis Del Mar (age 9)

Steffen Cole Moser
as K.E. Del Mar (age 11)

Cheyenne Hill
as Alma Del Mar Jr. (age 13)

Cayla Wolever
as Jenny Del Mar (age 11)

Sarah Hyslop
as Alma Del Mar Jr. (age 9-12)

Jacey Kenny
as Jenny Del Mar (age 7-8)

Keanna Dubé
as Alma Del Mar Jr. (age 5)

Brooklynn Proulx
as Jenny Del Mar (age 4)

Hannah Stewart
as Alma Jr. (age 3)

Jake Church
as Bobby Twist (age 10)

James Baker
as Farmer #1

Pete Seadon
as Farmer #2

Jerry Callaghan
as Judge

Ken Zilka
as Roughneck #1

John Tench
as Roughneck #2

Will Martin
as Carl

Gary Lauder
as Killer Mechanic

Christian Fraser
as Grease Monkey

Cam Sutherland
as Assailant

Barb Mitchell
as Western Dancer (uncredited)

Rodrigo Prieto
as Young Mexican (uncredited)

Ken Roberts
as Signal Bartender (uncredited)

Kailin See
as Hippy Girl (uncredited)

Jayson Therrien
as Bar Patron (uncredited)

Erika Walter
as Waitress #2 (uncredited)