- Emile Hirsch Christopher McCandless
- Marcia Gay Harden Billie McCandless
- William Hurt Walt McCandless
- Jena Malone Carine McCandless
- Brian Dierker Rainey
- Catherine Keener Jan Burren
- Vince Vaughn Wayne Westerberg
- Kristen Stewart Tracy
- Hal Holbrook Ron Franz
- Thure Lindhardt Mads
- Zach Galifianakis Kevin
- Merritt Wever Lori
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