Ennio Morricone is probably the most famous film composer of the 20th century. He is also one of the most prolific composers working in any medium. No exact figure is available, but he's scored several hundred films over the past several decades, perhaps as many as 500. While these have been in almost every imaginable musical style (and for almost every imaginable kind of movie), he is most identified with the "spaghetti Western" style of soundtracks, which he pioneered when providing the musical backdrop for the films of director Sergio Leone.