The Ben Watkins-created series will debut across more than 240 countries and territories on Prime Video on 4 November, 2026

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Amazon MGM Studios and Prime Video have unveiled a trailer for docudrama series The Greatest, which chronicles the life of Muhammad Ali.

The series will debut all episodes in more than 240 countries and territories worldwide on 4 November, 2026, exclusively on Prime Video.

The trailer traces Muhammad Ali’s coming of age story, following a young Cassius Clay through the personal, professional and political battles he fought inside and outside the ring.

Newcomer Jaalen Best stars as Cassius Clay/Muhammad Ali, alongside Omari Hardwick as Cassius Clay Sr., Dana Gourrier as Odessa ‘Bird’ Clay, Kai Parham as Rudy Clay, Amin Joseph as Sonny Liston, Giovanni Ribisi as Angelo Dundee, and Michael Ealy as Malcolm X. 

The Greatest is the first authorised scripted series about the life of Ali created and executive produced by Ben Watkins who also serves as showrunner.

Alongside Ben Watkins’ Blue Monday Productions (Cross), and Michael B. Jordan’s Outlier Society, are Authentic Studios (a division of Authentic Brands Group), Roc Nation, Shawn Carter, Polygram Entertainment (a Universal Music Group partner) and Grace: A Storytelling Company, with Watkins as showrunner and executive producer.

Ali’s wife Lonnie Ali is executive producer. Outlier Society president Elizabeth Raposo executive produces, along with Authentic Brands Group’s Corey Salter, Matthew Gross, and Marc Rosen, also serving as executive producers.

Additional executive producers include Craig Siebels, Aiyana White, Jeff Augustin, Katie Wech, Owen Shiflett; Boyd Muir, Michele Anthony, and Josh Wakely via his Grace: A Storytelling Company and Co-EPs David Blackman for Polygram and Stefano Agosto, executive vice president of television at Outlier Society; as well as Desiree Perez of Roc Nation.