Christopher McCandless / Alexander Supertramp
Emile Hirsch
Billie McCandless
Marcia Gay Harden
Sonja
Signe Egholm Olsen
Jim Gallien
Graduation Reader
James J. O'Neill
Waitress
Malinda McCollum
Building Manager
Paul Knauls
Kevin
Zach Galifianakis
Wayne's Crew #1
Craig Mutsch
Wayne's Crew #2
Jim Beidler
Hutterite #1
John Decker
Hutterite #2
John Hofer
Walt McCandless
William Hurt
Hutterite #3
Jerry Hofer
Hutterite #4
Terry Waldner
Gail Borah
Robin Mathews
Bar Girl
Candice Campos
Lee's Ferry Ranger
Steven Wiig
Man In Phone Booth
Floyd Wall
Christopher McCandless (age 4)
Bryce Walters
Immigration Officer
Jim Davis
Social Worker
Cheryl Francis Harrington
Bull
R. D. Call
Carine McCandless / Additional Narration (voice)
Jena Malone
Carine McCandless (age 11)
Haley Ramm
Lori
Merritt Wever
Insane Cain
Everett 'Insane Wayne' Smith
Announcer
John Jabaley
Leonard Knight
Book Shopper #1
Matt Contreras
Book Shopper #2
Denise Sitton
Additional Narration (voice)
Sharon Olds
Carine McCandless
Tourist (uncredited)
J. Nathan Simmons
Rainey
Brian H. Dierker
Young Boy (voice) (uncredited)
Parris Mosteller
Atlanta Braves fan (uncredited)
Timothy Levine
Bank Teller (uncredited)
Haley Sweet
Big Wheel Boy (uncredited)
Aaron Wayne Hill
Bear
Bart the Bear II
Jan Burres
Catherine Keener
Wayne Westerberg
Vince Vaughn
Tracy Tatro
Kristen Stewart
Ronald "Ron" Franz
Hal Holbrook
Mads
Thure Lindhardt
Production Supervisor
Executive Producer
David Blocker
Stunts
Steve Hart
Sound Designer
Martín Hernández
Supervising Sound Editor
Costume Design
Mary Claire Hannan
Original Music Composer
Michael Brook
Producer
Art Linson
Director
Sean Penn
Screenplay
Steadicam Operator
Jacques Jouffret
Sound Effects Editor
Arturo Zarate
Bill Pohlad
Editor
Jay Cassidy
Cole S. McKay
Christopher Barnett
Sound Re-Recording Mixer
Lora Hirschberg
Prosthetics
Gary Archer
Director of Photography
Éric Gautier
Thanks
Jack Nicholson
Casting
Francine Maisler
Gary J. Wayton
Music
Eddie Vedder
Songs
Kaki King
Production Design
Derek R. Hill
Art Direction
Domenic Silvestri
John Richardson
Set Decoration
Christopher Neely
Danielle Berman
Casting Associate
Lauren Grey
Kathy Driscoll-Mohler
Costume Supervisor
Jacqueline Aronson
Music Supervisor
David Franco
Still Photographer
Chuck Zlotnick
Michael Minkler
Script Supervisor
Lyn Matsuda Norton
Luca Kouimelis
Hair Department Head
Sterfon Demings
Makeup Department Head
Frank Hildebrand
John J. Kelly
Second Unit
Brinton Bryan
Assistant Director
John R. Saunders
David Webb
Stunt Coordinator
Doug Seus
Color Timer
Chris Regan
Special Effects Supervisor
Donald Frazee
Visual Effects Producer
Rod Park
Jonathan Bell
Property Master
Mychael Bates
Tricia Pifer
Sound Mixer
Nerses Gezalyan
Edward Tise
Set Costumer
Amy Fegely
Critter Pierce
Makeup Artist
Mike Smithson
Book
Jon Krakauer