Chuck

Liev Schreiber

Chuck Wepner

Michael Rapaport

John Wepner

Leslie Lyles

Charlotte

Ron Perlman

Al Braverman

Naomi Watts

Linda Wepner

Velizar Binev

Referee

Jason Jones

Arty

Jim Gaffigan

John Stoehr

Elisabeth Moss

Phyllis Wepner

Anthony J. Gallo

Maitre'D

Leonard Zimmerman

Hotel Valet (uncredited)

Shade Rupe

16mm Cameraman (uncredited)

William Hill

Paddy

Pooch Hall

Muhammad Ali

Mark Borkowski

Joe

Catherine Corcoran

Sandy

Jen Ponton

Stallone's PA

Wass Stevens

Johnny Dicesare

Zina Wilde

Teacher

J.J. Kandel

Jimmy the Cop

Ivan Martin

Bobby Vann

Genko Ivanov

-

Robert C. Kirk

Warden

Morgan Spector

Sylvester Stallone

Emil Tonev

-

Philippe Falardeau

-

Kelvin Hale

Charlie Polite

Megan Sikora

Flo Wepner

Georgia X. Lifsher

Rachel

Melo Ludwig

Young Kimberly (aged 6)

Georgi Georgiev

Mouthy

Mihail Nedyalkov

Nerk

Liv Rooth

Platinum Blonde

Joe Starr

Manny

Rick Zahn

Police Captain

Jonathan Wilde

Dave

Charlie Meany

Sports Interviewer

Lucinda Rogers

Lil

Paul Mecurio

Goomba Partier

Tressa Giardina

-

Sadie Sink

Kimberly