Joseph Stanley Williams (born September 1, 1960) is an American singer, songwriter and film score composer, best known as the lead vocalist of the rock band Toto from 1986 to 1988 and again since 2010.

[1] Outside of Toto, he has worked as a composer and studio vocalist, including providing the singing voice of adult Simba in the 1994 animated film The Lion King.

Williams was the lead vocalist for 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.

Williams released an album of cover songs from artists such as Elton John, Bryan Adams, Diane Warren, and Kevin Cronin in 2006 called Two of Us, featuring piano and voice only.

Joseph Williams has also been busy as a composer of film and drama scores, most notably for episodes of the science fiction series Roswell, and The Lyon's Den starring Rob Lowe.

He reprised this singing role in the direct-to-video animated film Mickey's Magical Christmas: Snowed in at the House of Mouse.