James Franco

Aron Ralston

Kate Mara

Kristi Moore

Amber Tamblyn

Megan McBride

Clémence Poésy

Rana

Lizzy Caplan

Sonja Ralston

Kate Burton

Aron's Mom

Treat Williams

Aron's Dad

Sean Bott

Aron's Friend

Fenton Quinn

Blue John

Pieter Jan Brugge

Eric Meijer

Norman Lehnert

Dan

Darin Southam

Zach

Bailee Michelle Johnson

Sonja Age 10

Brad Johnson

Aron's Friend (uncredited)

Stacey Ann Turner

Aron's Friend (uncredited)

Lonzo Liggins

Reporter (uncredited)

Elizabeth Hales

Patron (uncredited)

Aron Ralston

Self (uncredited)

Kyle Paul

Best Man (uncredited)