Joseph Stanley Williams (born September 1, 1960, Santa Monica, California, United States), is an American rock singer and film score composer best known for his work in the rock band Toto. He is the son of film composer John Williams and actress/singer Barbara Ruick and the grandson of jazz drummer Johnny Williams and actors Melville Ruick and Lurene Tuttle. 　　Joseph Williams was lead vocalist with Toto during the mid-to-late 1980s and was featured on the albums Fahrenheit (1986) and The Seventh One (1988) before leaving due to personal problems. He can also be heard on the album Toto XX (1998), a compilation of rare and unreleased tracks. He is featured on Toto's 2006 album, Falling in Between, sharing lead vocals with Steve Lukather on "Bottom of Your Soul". In addition to his guest spot on the last Toto album, Williams was a guest singer at several Toto concerts. 　　Since 2010, Joseph is once again Toto's lead singer. He re-joined the band during their reformation tour and has toured with them since then.