Matthew McConaughey Ron Woodroof
Dallas Roberts David Wayne
Jennifer Garner Eve
Steve Zahn Tucker
Jared Leto Rayon
Jean-Marc Vallée Editor, Director
Kevin Rankin T.J.
Denis O'Hare Dr. Sevard
Michael O'Neill Richard Barkley
J.D. Evermore Clint
Griffin Dunne Dr. Vass
James DuMont Rayon's Father
Jane McNeill Francine Suskind
Tony Bentley Judge
Douglas M. Griffin Rog
Sean Boyd Border Agent
Carl Palmer FDA Customs Agent
Deneen Tyler Denise
Rich Delia Casting
Selina van den Brink Set Decoration Buyer
Juliet Reeves London Rodeo Girl (uncredited)
Paul Schnee Casting
Donna DuPlantier Nurse Frazin
Lawrence Turner Foreman
Ian Casselberry Hispanic Orderly
Jo Caron Foley Recording Engineer
Cassian Elwes Executive Producer
Craig Borten Writer, Quicksilver Cowboy
Robin Mathews Makeup Department Head
Anton Fischlin Sound Effects Editor, Sound Designer
Kerry Barden Casting
Adruitha Lee Hair Department Head
Rachel Wulff News Anchor
John Paino Production Design
Henry Frost Gay Cowboy
Rick Espaillat Michael
Nicolas Chartier Executive Producer
Yves Bélanger Director of Photography
Steffie Grote The Girl With The Snake Tattoo (uncredited)
Pierre Thériault Post Production Supervisor
Jennifer Kamrath Key Set Costumer
Sidney Brisco Gaffer
Renaldo Jackson Gaffer
Scott Takeda Mr. Yamata
Martin Pensa Editor
Robbie Brenner Producer
John R.C. Davis Production Coordinator
Paul Col Foley Editor, First Assistant Sound Editor
Mark C. Stevens Second Assistant Director
Roger Johnson Graphic Designer
Kat Percy Key Hair Stylist
Andrew Wert Property Master
A. Welch Lambeth Transportation Coordinator
Rachel Winter Producer
Melisa Wallack Writer
Anne Marie Fox Still Photographer
David L. Bushell Executive Producer
Luis Lopez DeVictoria Camera Operator
Rick Davis Transportation Captain
Simon Meilleur Foley Artist
Kevin Lum Second Second Assistant Director
Parry Creedon Production Supervisor, Co-Producer
Jeanine Hill Rodeo Girl (uncredited)
Marc Cote VFX Supervisor
Martin Covert Ian
Nathan Ross Executive Producer
Diana Ascher Post Production Accountant
Bradford Cox Sunny
Alex Terzieff Stunt Coordinator
Leonard Reynolds III Location Manager
Katie Riggs Special Effects Coordinator
Holly Wiersma Executive Producer