1964 – Converts and joins the Nation of Islam, and changes his name from Cassius Clay to Muhammad Ali. May 25, 1965 – Rematch with Liston, wins again by knockout in the first round.

1964 – Converts and joins the Nation of Islam, and changes his name from Cassius Clay to Muhammad Ali. May 25, 1965 – Rematch with Liston, wins again by knockout in the first round.

1964 – Converts and joins the Nation of Islam, and changes his name from Cassius Clay to Muhammad Ali. May 25, 1965 – Rematch with Liston, wins again by knockout in the first round.

John F. and Jacqueline Kennedy had an open marriage. Muhammad Ali met Sonji Roi and proposed to her on the same day. Charles Dickens and King Henry VII both fell in love with their wife’s sisters.

Clay was introduced to Ali by his manager, Herbert Muhammad, when the heavyweight champion still was known as Cassius Marcellus Clay. They married just 41 days later, on Aug. 14, 1964.

CNN Editorial Research (CNN) — Here is a look at the life of boxing legend Muhammad Ali, three-time world heavyweight champion and Olympic gold medalist. Personal Birth date: January 17, 1942 ...

CNN Editorial Research (CNN) — Here is a look at the life of boxing legend Muhammad Ali, three-time world heavyweight champion and Olympic gold medalist. Personal Birth date: January 17, 1942 ...

CNN Editorial Research (CNN) — Here is a look at the life of boxing legend Muhammad Ali, three-time world heavyweight champion and Olympic gold medalist. Personal Birth date: January 17, 1942 ...

His book, "GOAT: A Tribute to Muhammad Ali," weighs 75-pounds, and is covered in silk and Louis Vuitton leather. It has 792 pages, is 20-by-20-inches, and has 600,000 words and more than 3,000 images.