Ali starred in a Broadway musical.

One aspect about Muhammad Ali that most people probably don't know is Ali starred in a Broadway musical. He once had a Broadway musical lead role. Indiewire.com claims that while Ali was prohibited from boxing in 1969, he appeared in the musical "Buck White."

He gave a musical performance on the Ed Sullivan Show. One of the earliest black male Broadway productions, the musical centers on a militant black speaker who addresses a gathering of black political activists. The play failed in spite of Ali's fame. Only seven performances were given, according to Indiewire.

The show lasted for only five days, during the period in which Ali had been stripped of his title and banned from boxing for his refusal to join the Army and fight in Vietnam. Today, it is hard to find any evidence of the show other than his performance of “We Came in Chains” on The Ed Sullivan Show on January 18, 1970.