Ali died Friday at a Phoenix-area hospital, where he had spent the past few days being treated for respiratory complications, a family spokesman confirmed to NBC News. He was 74.

"After a 32-year battle with Parkinson's disease, Muhammad Ali has passed away at the age of 74. The three-time World Heavyweight Champion boxer died this evening (June 3, 2016)," Bob Gunnell, a family spokesman, told NBC News.

Ali had suffered for three decades from Parkinson's Disease, a progressive neurological condition that slowly robbed him of both his legendary verbal grace and his physical dexterity. A funeral service is planned in his hometown of Louisville, Kentucky.