The famous athlete known as "The Greatest" is Muhammad Ali. Ali was an iconic professional boxer, renowned for his remarkable skills in the ring as well as his charisma and activism outside of it. His fights, particularly against Sonny Liston, Joe Frazier, and George Foreman, are legendary, and he is remembered not only for his titles but also for his social impact. Ali's legacy continues to inspire athletes worldwide, emphasizing the importance of courage, belief, and perseverance.