Joseph Williams (left) with Toto in Copenhagen on 20 July 2010
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 last 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. 
Williams released his first, self-titled solo album in 1982. After his tenure with Toto he has released several more. Many of Toto's members have contributed to his solo work over the years. In 2003 he released an album called Vertigo, a project he initiated, but where he was not in full charge of the production, only recording and supplying the vocals. The second Vertigo album, "Vertigo 2", was released in 2006. Williams released an album of cover songs from renowned artists such as Elton John, Bryan Adams, Diane Warren, and Kevin Cronin in 2006, called Two of Us, featuring piano and voice only. He returned with two more voice & piano albums in 2007, Smiles and Tears, also consisting of classic hits by popular artists. His latest solo album containing original songs, This Fall, was released in November 2008.
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. In 2003 he was nominated for an Emmy Award for "Outstanding Main Title Theme Music" for the TV series Miracles. The music to the CBS miniseries Category 7: The End of the World and the TV film Momentum were composed by him. He was the writer of the original English lyrics for the song Lapti Nek and the Ewok Celebration from the original 1983 release of Star Wars Episode VI: Return of the Jedi, which was scored and conducted by his father John Williams. He also composed the Max Rebo Band source cues and an unknown source cue for the same film.