Kingsley Ben-Adir

Character: Malcolm X

Eli Goree

Character: Cassius Clay

Aldis Hodge

Character: Jim Brown

Leslie Odom Jr.

Character: Sam Cooke

Joaquina Kalukango

Character: Betty X

Nicolette Robinson

Character: Barbara Cooke

Michael Imperioli

Character: Angelo Dundee

Lawrence Gilliard Jr.

Character: Bundini Brown

Christian Magby

Character: Jamaal

Jeremy Pope

Character: Jackie Wilson

Christopher Gorham

Character: Johnny Carson

Beau Bridges

Character: Mr. Carlton

Lance Reddick

Character: Brother Kareem

Derek Roberts

Character: Jerome X

Emily Bridges

Character: Emily Carlton

Amondre D. Jackson

Character: L.C. Cooke

Jerome A. Wilson

Character: Elijah Muhammad

Hunter Burke

Character: Jess Rand

Robert Stevens Wayne

Character: Jules Podell

Randall Newsome

Character: Myron Cohen

Matt Fowler

Character: Ronnie

Chris Game

Character: Ferdie Pacheco

Alan Wells

Character: Ed McMahon

Dustin Lewis

Character: Miami Announcer

John Curran

Character: Wembley Announcer #1

Mark Allan Stewart

Character: Wembley Announcer #2

Amar Khalil

Character: Bobby

Ian Alexander Desdune II

Character: Michael

Jeremy Anderson

Character: Lamont 3X

Pierce Lackey

Character: Reporter 1

Dave Pileggi

Character: Reporter 2

Ashley LeConte Campbell

Character: Karen

Kimberly B Brown

Character: Geraldine Liston

Nola Epps

Character: Attallah Shabazz

Kipori Woods

Character: Cliff White

Joshua Nylan Tanner

Character: Boston Ballroom Announcer

Sean Monaghan

Character: Henry 'The Hammer' Cooper

Aaron D. Alexander

Character: Sonny Liston

Jason Ament

Character: Miami Referee

Nathan Siebring

Character: Wembley Referee

Kevin Reid

Character: Cameraman

Cody Johnson

Character: Tristen

Rachael Knaps

Character: Boxing Match Attendee (uncredited)