Jena Malone Carine McCandless / Additional Narration (voice)
Marcia Gay Harden Billie McCandless
Catherine Keener Jan Burres
Kristen Stewart Tracy Tatro
Sean Penn Producer, Screenplay, Director
Vince Vaughn Wayne Westerberg
Zach Galifianakis Kevin
R. D. Call Bull
Jack Nicholson Thanks
William Hurt Walt McCandless
Kathy Driscoll-Mohler Casting Associate
Mary Claire Hannan Costume Design
Hal Holbrook Ronald "Ron" Franz
Emile Hirsch Christopher McCandless / Alexander Supertramp
Derek R. Hill Production Design
Merritt Wever Lori
John J. Kelly Executive Producer
Gary J. Wayton Stunts
J. Nathan Simmons Tourist (uncredited)
Cole S. McKay Stunts
Haley Ramm Carine McCandless (age 11)
Thure Lindhardt Mads
Signe Egholm Olsen Sonja
Mychael Bates Property Master
Christopher Barnett Sound Effects Editor
Nerses Gezalyan Sound Mixer
Gary Archer Prosthetics
Francine Maisler Casting
Eddie Vedder Music, Songs
Lora Hirschberg Sound Re-Recording Mixer
Lyn Matsuda Norton Script Supervisor
Cheryl Francis Harrington Social Worker
Bill Pohlad Producer
Steve Hart Stunts
Luca Kouimelis Script Supervisor
Domenic Silvestri Art Direction
Michael Minkler Sound Re-Recording Mixer
Chuck Zlotnick Still Photographer
Art Linson Producer
Jacques Jouffret Steadicam Operator
Chris Regan Color Timer
Mike Smithson Makeup Artist
John R. Saunders Assistant Director
David Blocker Executive Producer
Michael Brook Original Music Composer
Éric Gautier Director of Photography
David Webb Assistant Director
Lauren Grey Casting Associate
Jay Cassidy Editor
Martín Hernández Sound Designer, Supervising Sound Editor
Robin Mathews Gail Borah, Makeup Department Head
David Franco Music Supervisor
John Richardson Art Direction
Danielle Berman Set Decoration
Brian H. Dierker Rainey
Frank Hildebrand Executive Producer
Edward Tise Sound Mixer
Haley Sweet Bank Teller (uncredited), Production Supervisor
Christopher Neely Set Decoration
John Jabaley Announcer
Jon Krakauer Book, Thanks
Steven Wiig Lee's Ferry Ranger
Tricia Pifer Visual Effects Producer
Brinton Bryan Second Unit
Aaron Wayne Hill Big Wheel Boy (uncredited)
Amy Fegely Set Costumer
Bart the Bear 2 Bear
Bryce Walters Christopher McCandless (age 4)
Jacqueline Aronson Costume Supervisor
Donald Frazee Special Effects Supervisor
Leonard Knight Leonard Knight
Sterfon Demings Hair Department Head