Liev Schreiber

as Chuck Wepner

Naomi Watts

as Linda Wepner

Elisabeth Moss

as Phyllis Wepner

Ron Perlman

as Al Braverman

Jim Gaffigan

as John Stoehr

Michael Rapaport

as John Wepner

Pooch Hall

as Muhammad Ali

Morgan Spector

as Sylvester Stallone

Jason Jones

as Arty

Philippe Falardeau

Director