Hugh Jackman

Charlie Kenton

Dakota Goyo

Max Kenton

Evangeline Lilly

Bailey Tallet

Kevin Durand

Ricky

Anthony Mackie

Finn

Hope Davis

Aunt Debra

James Rebhorn

Marvin

Karl Yune

Tak Mashido

Sophie Levy

Big Sister

Tess Levy

Little Sister

Olga Fonda

Farra Lemkova

John Gatins

Kingpin

Gregory Sims

Bill Panner

Torey Adkins

Large Texan Man

Phil LaMarr

ESPN Boxing Commentator

John Hawkinson

San Leandro Gentleman #2

David Alan Basche

ESPN Boxing Commentator

Julian Gant

Starblaze Arena Reporter

Leilani Barrett

Virgin America Spectrum Ref

Peter Carey

Bing Arena Announcer

Dan Lemieux

Bing Arena Ref

Ricky Wayne

Underground Promoter

Taris Tyler

Robot Promoter

Kevin Dorman

Atom Performance Capture

John Manfredi

Sergei Lemkova

Mike Ancrile

Fight Fan (uncredited)

Leah Barkoff

Upscale Fight Fan (uncredited)

Ben Hernandez Bray

Ricky's Henchman (uncredited)

Ron Causey

Kingpin's Henchman (uncredited)

Johnny Flynn

ESPN Commentator (uncredited)

Logan Fry

Rabid Fight Fan (uncredited)

Kef Lee

Zeus Robot Handler #1 (uncredited)

Megan Mockensturm

Fight Fan (uncredited)

Anton Narinskiy

Farra's Body Guard (uncredited)

Chris Newman

Starblaze Security Guard (uncredited)

Alan D. Purwin

Helicopter Pilot (uncredited)

Miguel Sandoval

Judge (uncredited)

Jojuan Westmoreland

Zoo Fight Fan (uncredited)

Amanda Bright

Ricky's Girl (uncredited)