Muhammad Ali, a three-time world heavyweight champion, died June 3, 2016, at the age of 74. He retired from boxing in 1981 and devoted himself to social causes. Here's a look back at the champ over the years.
Muhammad Ali died on June 3 in a Phoenix hospital. He was 74. Boxer, philanthropist and social activist Muhammad Ali is considered one of the great cultural icons of the twentieth century. After winning all of his bouts in the 1960s, he received nicknames like "The People's Champion" and "The Greatest."
Muhammad Ali took home the gold in the Light Heavyweight in the 1960 Olympic Games. At 6'3" tall, he was quite an imposing figure in the ring.
Originally known as Cassius Clay, the boxer won his first world heavyweight championship at 22 in 1964. That same year, he changed his name to Muhammad Ali after joining the Nation of Islam.
After losing the "Fight of the Century" against Joe Frazier in 1971, Ali returned to the ring in 1972, winning a total of six fights that year against opponents like Jerry Quarry, Bob Foster and Floyd Patterson.
Quite the ladies man, Ali has been married four times and is the father to nine children--seven daughters and two sons. The boxing champ met his first wife, a cocktail waitress named Sonji Roi, just one month before they married in August 1964. They divorced two years later. It's believed Roi's objection to certain Muslim customs contributed to the breakup.
After refusing to be drafted for religious reasons, Ali was convicted in 1967 and banned from boxing for 3-1/2 years. He returned to the ring with the "Fight of the Century" after his conviction was overturned in 1971.
Sonny Liston lies out for the count after being KO'd in the first round of his return title fight by world heavyweight champion Muhammad Ali, Lewiston, Maine, May 25, 1965.
The rivalry between Ali and Frazier was one of the best in boxing history.
After going a whopping 15 rounds, Joe Frazier won the "Fight of the Century" against the People's Champion. The 1971 fight would mark Ali's first professional boxing loss.
In October 1975, Muhammad Ali and Joe Frazier fought their third and final match. Nicknamed the "Thrilla in Manilla," the bout is often ranked as one of the greatest fights of the 20th century. Ali won the tie-breaker after Frazier's trainer refused to let him come out for the 15th round.
In a split decision, the Greatest lost his 1978 heavyweight title to Leon Spinks. Eight months later, Ali won the rematch, making him the first champion to win the belt three times. Following this win, Ali announced his retirement from boxing on July 27, 1979.
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Muhammad Ali walks around his opponent before finishing the fight circa 1977 during a boxing match.
Ali watched on as the flame rose to the Olympic torch.
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That same year, the International Olympic Committee president, Juan Antonio Samaranch, hung a gold medal around Ali’s neck. The medal was specially made to replace one Ali said he threw into a river after being refused service because he was black.
In 1999, Sports Illustrated crowned Ali "Sportsman of the Century," while the BBC named him "Sports Personality of the Century."
Still rolling with the bunches, Ali and wife Lonnie Ali (L) arrived at Phoenix's "Celebrity Fight Night X' in 2004. The charity event raised money for the Muhammad Ali Parkinson Research Center.
Along with daughter Rasheda Ali-Walsh, the boxing legend watched a younger version of himself at the media opening of the Muhammad Ali Center on Nov. 18, 2005.
President Bush presents the Presidential Medal of Freedom, Wednesday, Nov. 9, 2005, to Ali in the East Room of the White House.
Ali arrives to see a fight of his daughter U.S. boxer Laila Ali, and Asa Maria Sandell from Sweden in Berlin on Dec. 17, 2005.
Along with Michael J. Fox and Tracy Pollan, Muhammad Ali posed for pictures at "A Funny Thing Happened On The Way To Cure Parkinson's" benefit gala at New York City's Waldorf-Astoria in 2006.
Ali accepted the President's Award during the 40th NAACP Image Awards held at the Shrine Auditorium in February 2009. President Barack Obama told Ali, "As a fighter, you were something spectacular. You shocked the world, and you inspired it, too. And even after all the titles and legendary bouts, you're still doing it."
Ali, center, received the Liberty Medal from his daughter Laila Ali with his wife Lonnie Ali at his left during a ceremony at the National Constitution Center, Sept. 13, 2012, in Philadelphia. The honor is given annually to an individual who displays courage and conviction while striving to secure liberty for people worldwide.
A portrait of boxing great Muhammad Ali in his prime was part of the collection of artwork that went on display at the Muhammad Ali Center in downtown Louisville, Kentucky.
Ali, center, and NFL great Tom Jackson, right, shakes hands with officials prior to the coin toss before the Sugar Bowl NCAA college football game on Jan. 2, 2013, in New Orleans.
Jennifer Lopez, right, speaks at Muhammad Ali's Celebrity Fight Night XIX at the JW Marriott Desert Ridge Resort and Spa, as Ali and his wife, Lonnie, look on March 23, 2013, in Phoenix.
Muhammad Ali attends the 2014 Muhammad Ali Humanitarian Awards at the Louisville Marriott Downtown on September 27, 2014 in Louisville, United States.
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Laila Ali and Muhammad Ali appear as HBO Films and the Muhammad Ali Center co-host the U.S. Premiere of "Muhammad Ali's Greatest Fight" at Muhammad Ali Center on October 2, 2013 in Louisville, Kentucky.