Raised in a Baptist househod, the boxing legend changed his named from Cassius Marcellus Clay Jr to Muhammed Ali after coverting to IslamKen Regan
Millions of Muslims from around the globe are preparing to observe Ramadan, the religious month of fasting.
For 30 days, they will not eat or drink from sunrise and sundown and refrain from sexual intercourse, smoking and profanity in a bid to become closer to Allah.
They are also encouraged to give back to the community and take part in charitable deeds.
But for celebrities who have the world at their feet, and are new to Islam, resisting temptation may prove a little difficult.
Janet Jackson will be taking part in Ramadan for the first time after converting to Islam last year. The singer, who is the younger sister of the late Michael Jackson, is said to have said goodbye to her Christian upbringing after getting married to billionaire businessman Wissam Al Mana.
IBTimes UK introduces you to some of the world's most famous Islam converts.
Janet Jackson is reportedly now a Islam convert following her marriage to husband Wissam Al Mana in 2013 Tumblr
Late Michael Jackson's old brother Jermaine Jackson became a Muslim in 1989 after falling in love with Islam during a tour of the Middle East. "Having embraced Islam, I felt as if I were born again," he proclaimed Reuters
Jemima Khan, who was raised Jewish, became a Muslim few months after she married Pakistani cricketer and philanthropist Imran Khan in 1995 Dylan Martinez/Reuters
Former world heavyweight champion Mike Tyson is thought to have converted to Islam during his time in prison. After completing the holy pilgrimage to Mecca, Saudi Arabia in July 2010 he tweeted: "I just left the Holy City of Mecca where I was blessed to have been able to make Umrah...Inshallah (God willing), Allah will continue to bless me to stay on the straight path."Reuters
American actress Ellen Burstyn was raised Catholic but later converted to Islam saying that she was a "spirit opening to the truth that lives in all of these religions"Reuters
