Jack Dempsey
— Tiger Jack O'Day
Esther Ralston
— Holly Malloy
Hayden Stevenson
— Society Sullivan
Edgar Kennedy
Charles Reisner
— Chuck - Opposition Manager
George Ovey
— Ed Martin - Manager / Sparring Partner
Carmelita Geraghty
— Waitress in Boarding House
Kate Price
Beatrice Burnham
Virginia Lee Corbin
Gertrude Astor
James O. Barrows
Ethel Shannon
Malvina Polo
Frank Hagney
— Spike McGann - Prizefighting Opponent
Otto Lederer
Gladys Varden
Pat Harmon
Margaret Quimby
— Queenie Millard
Louise Carver
Cathleen Calhoun
Teddy Hayes
— Prizefighting Opponent
Florence Lee
— Police Commisioner's Daughter
Ed Hubbell
— Little Boy (uncredited)