Prime Video is developing The Greatest, a new series about Muhammad Ali. The Greatest will mark the first authorized scripted series about Ali's life and have unprecedented access to his estate. The sports icon and humanitarian died at age 74 in 2016. The Greatest will explore the incomparable life of Ali, born Cassius Clay Jr., and revisit the "amazing victories and defeats that made Ali a legend, both in and out of the ring," according to an official description. The show will focus on "all the moments that took place outside of the spotlight."