William Henry Marcus Miller Jr. is an American musician, songwriter and record producer. He has worked with trumpeter Miles Davis, pianist Herbie Hancock, singer Luther Vandross, and saxophonists Wayne Shorter and David Sanborn, among others. He was the main songwriter and producer on three of Davis's albums: Tutu (1986), Music from Siesta (1987), and Amandla (1989). His collaboration with Vandross was especially close; he co-produced and served as the arranger for most of Vandross's albums, and he and Vandross co-wrote many songs, including the hits "I Really Didn't Mean It", "Any Love", "Power of Love/Love Power" and "Don't Want to Be a Fool". Miller also co-wrote the 1988 single "Da Butt" for Experience Unlimited.