Billy Conn

Billy Conn

Jean Parker

Patricia Mallory

Dick Purcell

Cliff Halliday

Alan Baxter

Joe Barton

Veda Ann Borg

Barbara Ellison

Jonathan Hale

Max Ellison

Ernest Whitman

Feets Johnson

John Kelly

Knockout Riley

Etta McDaniel

Magenta

Dick Elliott

Garvey

John Harmon

Morrie

Robert Barron

Devlin

Henry Armstrong

Sparring Partner

Sam Balter

Radio announcer (voice)

Arthur Donovan

Referee

Jack Roper

The Champ

Freddie Steele

Freddie Steel

Dan Tobey

Fight Announcer

Edmund Cobb

(uncredited)

Donald Douglas

(uncredited)

William Forrest

(uncredited)

Harrison Greene

(uncredited)

Kit Guard

(uncredited)

Russell Hicks

(uncredited)

Nora Lane

(uncredited)

Charles Sullivan

(uncredited)

William Telaak

(uncredited)