Steve Carell
as John du Pont

Channing Tatum
as Mark Schultz

Mark Ruffalo
as David Schultz

Sienna Miller
as Nancy Schultz

Vanessa Redgrave
as Jean du Pont

Anthony Michael Hall
as Jack

Guy Boyd
as Henry Beck

Brett Rice
as Fred Cole

Jackson Frazer
as Alexander Schultz

Samara Lee
as Danielle Schultz

Francis J. Murphy III
as Wayne Kendall

Jane Mowder
as Rosie

David Bennett
as Documentary Director

Lee Perkins
as Corporal

Robert Haramia
as Banquet Guest

Daniel Hilt
as Roberto Garcia

Bryan Cook
as Ben Langer

David Zabriskie
as Dan Bane

Zach Rey
as Foxcatcher Wrestler #1

Reece Humphrey
as Foxcatcher Wrestler #2

J.D. Bergman
as Foxcatcher Wrestler #3

Corey Jantzen
as Foxcatcher Wrestler #4

Frederick Feeney
as Seoul Referee

Mark Schultz
as Weigh-in Official #1

Lee Kemp
as Weigh-in Official #2

Jake Herbert
as Mark's Opponent at Trials

Donald Modrick
as Front Gate Guard

Gabrielle Burton
as School Secretary

Kevin Cooke
as Photographer

Richard E. Chapla Jr.
as Broiler Hut Cashier

Bill Ehrin
as Broiler Hut Patron

Roger Callard
as Helicopter Pilot

Dan Anders
as General

Barry Vlanich
as D.C. Partygoer

Sam Brehm
as Hank Church

Stan Dziedzic
as USA Wrestling Rep #1

David Miller
as USA Wrestling Rep #2

Brian Baumgartner
as USA Wrestling Rep #3

Joe Russo
as Olympic Trials Referee

Ken Williams
as Coach Ken

Gene Mills
as Worlds Referee

John C. Baxter
as Worlds Announcer

Rick Steigerwald
as Wexler Trainer

Marc Snider
as MMA Referee

Jaz Securo
as MMA Announcer

Corey Walker
as MMA Backstage Official

Alan Oppenheimer
as Du Pont Dynasty Narrator (voice)

Joe Fishel
as Trainer

Jackson Nunn
as Spectator (uncredited)