Muhammad Ali has died at the age of 74, a family spokesman has said.
The former world heavyweight boxing champion, one of the world's best-known sportsmen, died at a hospital in the US city of Phoenix in Arizona state after being admitted on Thursday.
He was suffering from a respiratory illness, a condition that was complicated by Parkinson's disease.
The funeral will take place in Ali's hometown of Louisville, Kentucky, his family said in a statement.
Born Cassius Marcellus Clay, Ali shot to fame by winning light-heavyweight gold at the 1960 Rome Olympics.
Nicknamed "The Greatest", the American beat Sonny Liston in 1964 to win his first world title and became the first boxer to capture a world heavyweight title on three separate occasions.
He eventually retired in 1981, having won 56 of his 61 fights.
- Won Olympic light-heavyweight gold in 1960
- Turned professional that year and was world heavyweight champion from 1964 to 1967, 1974 to 1978 and 1978 to 1979
- Had 61 professional bouts, winning 56 (37 knockouts, 19 decisions), and losing five (4 decisions, 1 retirement)