Muhammad Ali was born Cassius Marcellus Clay Jr. on January 17, 1942, in Louisville, Kentucky.
Muhammad Ali won the gold medal in the light heavyweight division at the 1960 Rome Olympics when he was just 18 years old.
He changed his name to Muhammad Ali in 1964 after converting to Islam, rejecting his birth name as his 'slave name'.
Ali is the only three-time lineal world heavyweight champion, having won the title in 1964, 1974, and 1978.
Known for his quick footwork and powerful jabs, Ali coined the famous phrase 'Float like a butterfly, sting like a bee.'
Ali refused to be drafted into the U.S. military during the Vietnam War, citing his religious beliefs and opposition to the war, which led to his boxing license being suspended for nearly four years.
In 1971, Ali fought Joe Frazier in what was billed as the 'Fight of the Century,' marking the first time two undefeated boxers fought for the heavyweight title. Frazier won in a unanimous decision.
Muhammad Ali regained the heavyweight title in 1974 by defeating George Foreman in the famous 'Rumble in the Jungle' in Zaire (now the Democratic Republic of the Congo).
The 'Thrilla in Manila' was the third and final match between Ali and Frazier in 1975, which Ali won by TKO after Frazier's corner stopped the fight after the 14th round.
Ali was known for his poetic trash talk, often delivering rhyming predictions before his fights, such as 'It will be a killer, and a chiller, and a thriller, when I get the gorilla in Manila.'
In 1984, Ali was diagnosed with Parkinson's disease, which many believe was caused by the numerous blows he took during his boxing career.
Ali was awarded the Presidential Medal of Freedom, the highest civilian award in the United States, by President George W. Bush in 2005.
Ali lit the Olympic flame at the 1996 Atlanta Games, a moment that became one of the most iconic images in sports history.
Outside the ring, Ali was a humanitarian and activist, engaging in various philanthropic activities and advocating for civil rights and religious freedom.
Muhammad Ali passed away on June 3, 2016, but his legacy as 'The Greatest' continues to live on, influencing athletes and people around the world.