Will Smith is starring in the new film Ali as fighter Muhammad Ali. The film begins in 1964, the year that Cassius Clay became world heavyweight champion, announced his conversion to Islam, and took on the name Muhammad Ali. The film is directed and co-written by Michael Mann who also made The Insider. Smith also starred in the films The Legend of Bagger Vance, Men In Black, Independence Day, and Six Degrees of Separation. Smith got his start as a rapper, making his first record in high school.