First Trailer for The Greatest Shows Jaalen Best as Muhammad Ali

Prime Video just dropped the official trailer and key art for their upcoming series, The Greatest. The show captures the transformation of a young fighter into one of the most famous athletes in history. Fans get a first look at newcomer Jaalen Best, who takes on the lead role of Cassius Clay before he became the icon known as Muhammad Ali.

This eight episode series follows his journey from his early days as a gifted athlete to his rise as a global figure. It promises to tell the story behind the man who changed the world of sports and American culture forever.

Mark your calendars for November 4, 2026. The full series will be available for fans worldwide to watch exclusively on Prime Video across more than 240 countries and territories. We cannot wait to see how they portray such an iconic life on screen.