Muhammad Ali, born Cassius Clay on Jan. 17, 1942, is regarded as one of the top professional boxers of all time. He was an activist who spent his life fighting for and enacting change.

The making of a champion: Ali’s early years American Heavyweight boxer, Cassius Clay (later Muhammad Ali, 1942 – 2016), making a fist as he lies on his hotel bed, London, 27th May 1963.

Floating and stinging as it explores the boxing icon’s life inside the ring and out, “Muhammad Ali” is another epic Ken Burns-produced dive into the life of an influential 20th-century figure.

Ken Burns' 'Muhammad Ali' documentary, premiering September 19 on PBS, is as thorough as it is fascinating.

Muhammad Ali's daughter Hana Ali gives PEOPLE an exclusive look at her new book At Home with Muhammad Ali, which contains intimate details and photos of the boxing legend's family life ...

A new Audible Original called Ali in Me hosted by his wife Lonnie Ali and one of his close friends, John Ramsey, shares many of those inspiring stories both from people who knew him and from ...