In 1987, after his fight with rival Sugar Ray Leonard, disappointed with the 12 rounds split decision for the WBC middleweight title and the final verdict in favor of Leonard, Marvin decided never to fight again and moved to Italy to pursue his acting career.
Hagler's wife Kay G Hagler confirmed the legend's death on Saturday; she wrote, "I am sorry to make an unfortunate announcement; today, unfortunately, my beloved husband Marvelous Marvin passed away unexpectedly at his home here in New Hampshire.
Our family requests that you respect our privacy during this difficult time. With love, Kay G. Hagler."
Marvin holds the undisputed middleweight champion title from 1980-1987.
Photo Source: France24
The world of sport is mourning the most beloved boxer's death; another champ Oscar De La Hoya took to Twitter and wrote, "Saddened to hear about the death of Marvelous Marvin Hagler. One of the greatest to ever step in the ring! RIP Marvelous."