埃米尔·赫斯基
Emile Hirsch
饰：Christopher McCandless
马西娅·盖伊·哈登
Marcia Gay Harden
饰：Billie McCandless
威廉·赫特
William Hurt
饰：Walt McCandless
吉娜·马隆
Jena Malone
饰：Carine McCandless
文斯·沃恩
Vince Vaughn
饰：Wayne Westerberg
克里斯汀·斯图尔特
Kristen Stewart
饰：Tracy
哈尔·霍尔布鲁克
Hal Holbrook
饰：Ron Franz
凯瑟琳·基纳
Catherine Keener
饰：Jan Burres
扎克·加利费安纳基斯
Zach Galifianakis
饰：Kevin
梅里特·维沃
Merritt Wever
饰：Lori
哈莉·拉姆
Haley Ramm
饰：Young Carine
托尔·林德哈特
Thure Lindhardt
饰：Thomas
Bryce Walters
Bryce Walters
饰：Chris McCandless at Age 4
罗宾·马修斯
Robin Mathews
饰：Gail Borah
Haley Sweet
Haley Sweet
饰：Bank Teller
Dan Burch
Dan Burch
饰：Passerby
Jim Gallien
Jim Gallien
饰：Himself
James O'Neill
James O'Neill
饰：Graduation Reader (as James J. O'Neill)
Malinda McCollum
Malinda McCollum
饰：Waitress
Paul Knauls
Paul Knauls
饰：Building Manager
Craig Mutsch
Craig Mutsch
饰：Wayne's Crew #1
John Hofer
John Hofer
饰：Hutterite #2
Jerry Hofer
Jerry Hofer
饰：Hutterite #3
Terry Waldner
Terry Waldner
饰：Hutterite #4
Candice Campos
Candice Campos
饰：Bar Girl
Floyd Wall
Floyd Wall
饰：Man in Phone Booth
Jim Davis
Jim Davis
饰：Immigration Officer
Everett 'Insane Wayne' Smith
Everett 'Insane Wayne' Smith
饰：Insane Cain
Leonard Knight
Leonard Knight
饰：Himself
Matt Contreras
Matt Contreras
饰：Book Shopper #1
Denise Sitton
Denise Sitton
饰：Book Shopper #2
Caroline Gelabert
饰：Graduating Billie McCandless (uncredited)
Mad Martian
Mad Martian
饰：Guy At Bar (uncredited)
Jim Beidler
Jim Beidler
饰：Wayne's Crew #2
John Decker
John Decker
饰：Hutterite #1
Rocky Self
Rocky Self
饰：Punk Rocker (uncredited)
Golbon Eghtedari
饰：Graduate (uncredited)
R.D. Call
饰：Bull
Geri Gilmore
饰：Old Lady Tourist (uncredited)
Edward Tubbs
饰：Brown Bronco Driver (uncredited)
Aaron Wayne Hill
饰：Big Wheel Boy (uncredited)
Alvin Ellie
饰：Homeless Patron (uncredited)
Joe Dustin
饰：The Beast (uncredited)
Paul Haasch
Paul Haasch
饰：Trail Guide (uncredited)
史蒂文·韦格
Steven Wiig
饰：Ranger Steve Koehler
J·内森·西蒙斯
极速暴力
饰：Tourist
Susan Spencer
饰：Parent
John Jabaley
饰：Announcer
巴特
Bart the Bear
饰：The Bear
Cheryl Francis Harrington
Cheryl Francis Harrington
饰：Social Worker
布莱恩·H.德里克
Brian H. Dierker
饰：Rainey (as Brian Dierker)
帕里斯·莫斯特勒
Parris Mosteller
饰：Young boy
Sharon Olds
Sharon Olds
饰：Additional Narrator
Carine McCandless
Carine McCandless
饰：Additional Narrator
西涅·埃格霍尔姆·奥尔森
Signe Egholm Olsen
饰：Sonja