Sergio Leone was an Italian film director and screenwriter, best known for his 'Spaghetti Western' films. He directed some of the most influential westerns of all time, including 'A Fistful of Dollars', 'For a Few Dollars More', and 'The Good, the Bad and the Ugly'. Leone's distinct style of filmmaking, which combined elements of classic Hollywood westerns with Italian art cinema, has had a lasting influence on the genre.