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Emile Hirsch

Christopher McCandless / Alexander Supertramp

Marcia Gay Harden

Billie McCandless

William Hurt

Walt McCandless

Jena Malone

Carine McCandless / Additional Narration (voice)

Brian H. Dierker

Rainey

Catherine Keener

Jan Burres

Vince Vaughn

Wayne Westerberg

Kristen Stewart

Tracy Tatro

Hal Holbrook

Ronald "Ron" Franz

Thure Lindhardt

Mads

Signe Egholm Olsen

Sonja

Jim Gallien

Jim Gallien

James J. O'Neill

Graduation Reader

Malinda McCollum

Waitress

Paul Knauls

Building Manager

Zach Galifianakis

Kevin

Craig Mutsch

Wayne's Crew #1

Jim Beidler

Wayne's Crew #2

John Decker

Hutterite #1

John Hofer

Hutterite #2