Watch: ‘The Greatest’ trailer introduces Jaalen Best as Muhammad Ali | Esquire First Look: ‘The…

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Watch: 'The Greatest' trailer introduces Jaalen Best as Muhammad Ali

Oct. 14 (UPI) — Prime Video is giving a glimpse of the new series The Greatest.

The streaming service shared a trailer for the show Wednesday featuring Jaalen Best as a young Cassius Clay, the man who would go on to be known as boxing legend Muhammad Ali.

The Greatest is the first authorized scripted series about Ali, who died at age 74 in 2016 following a 32-year battle with Parkinson's disease.

Ali's widow Lonnie Ali executive produces the show, which explores "the personal, professional and political battles" Ali fought inside and outside the ring.

"Set against a changing America, The Greatest follows a once-in-a-generation talent fighting for the right to become his own man. Through the fights that made him a champion and the convictions that made him an icon, a young man from Louisville transforms himself into Muhammad Ali, the greatest of all time," an official synopsis reads.

Cambridge, Hamilton, Woodstock and Cobourg built 1960s Louisville: Here's where The Greatest was filmed

The world remembers an icon. The Greatest is about a man. A husband, a father, a brother, a son – and one of the most compelling athlete the twentieth century produced. Amazon Prime Video’s first authorised scripted series about the life of Muhammad Ali filmed across Ontario from April 21 to July 22, 2025.

The Greatest is created and showrun by Ben Watkins (Cross), who also directs the first two episodes. Executive produced by Ali’s widow Lonnie Ali, Michael B. Jordan through his Outlier Society banner, Jay-Z through Roc Nation and Josh Wakely. The first season begins in 1960 when Cassius Clay wins the Olympic gold medal and runs through 1964 when he wins the heavyweight title for the first time.

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