Stars (in credits order)
Joe Louis
Self(archiveFootage)
Joe Louis Barrow Jr.
Self
Randy Roberts
Self - Historian
Dick Gregory
Walter Smith
Self - Friend
Chris Mead
Self - Biographer
John Roxborough
Self - Manager(archiveFootage)
Julian Black
Self - Trainer(archiveFootage)
Jack Johnson
Jack Blackburn
Lester Rodney
Gerald Early
Primo Carnera
Charles Rangel
Max Baer
Maya Angelou
Bill Cosby
Dorothy Mann
Marva Louis
Jimmy Braddock
Max Schmeling
Adolf Hitler
Gunnar Meinhardt
Margaret Guinyard
Jimmy Carter
Paul Schulder
Joshua Haberman
Berry Gordy
Jack Roper
Tony Galento
Jerry Lewis
Billy Conn
Eddie Eagan
Self - Boxing Commissioner(archiveFootage)
Jersey Joe Walcott
Ezzard Charles
Rocky Marciano
Sonny Marciano
Peter Marciano
Ruby Goldstein
Pete McDaniel
Self - Golf Historian
Horton Smith
Walter Winchell
Walter Winchell(archiveFootage)
Charlie Sifford
Hal Light
Self - Son of Detroit Promoter
Rose Morgan
Muhammad Ali
Gay Talese
Marilyn Resnick
Clyde Watkins
Frank Sinatra
Mark Conn
Self - Referee(archiveFootage)
Frank Fullam
Eddie Joseph
Ralph Edwards
Self(uncredited)(archiveFootage)
Dennis James
Charles Osgood
Self(uncredited)
Jane Pauley