Did you know that... In 1969, since being barred from boxing, and in debt (legal fees, family support), to earn money, Muhammad Ali hit the college lecture circuit, and even starred in the Broadway musical titled Buck White?
That's him in the photo above, at the center.
The show, written and directed by Oscar Brown Jr (one of the first Broadway productions by a black man), apparently wasn't much of a success since it ran for just seven performances.
The Broadway production was a musical adaptation of Joseph Dolan Tuotti’s play Big Time Buck White, and centered on a militant black lecturer who addresses a meeting organized by a black political group.
I couldn't find footage from the actual Broadway production (although to see Ali singing away on stage in character, I'd suggest you watch the documentary A.K.A. Cassius Clay by Jim Jacobs, which is streaming on Netflix right now); but in the clip below, watch Ali and the Broadway musical's cast perform the number We Came in Chains on the Ed Sullivan Show that same year; and see the poster for the production underneath: