Black Sabbath are an English heavy metal band from Birmingham, England. Formed in 1968 by Ozzy Osbourne (lead vocals), Tony Iommi (guitar), Geezer Butler (bass), and Bill Ward (drums and percussion), the band has since experienced multiple lineup changes, with a total of twenty-two former members. Originally formed as a heavy blues-rock band named Earth, the band began incorporating occult- and horror-inspired lyrics with tuned-down guitars, changing their name to Black Sabbath and releasing multiple gold and platinum records in the 1970s.

As one of the most influential heavy metal bands of all time, Black Sabbath helped define the genre with releases such as 1970's quadruple-platinum Paranoid. Black Sabbath has sold more than 100 million albums worldwide, and were ranked number one on MTV's Greatest Metal Bands countdown. Ozzy Osbourne was fired from the band in 1979, and while initially replaced by former Rainbow vocalist Ronnie James Dio, Black Sabbath would see a revolving lineup in the 1980s and 1990s that included vocalists Ian Gillan, Glenn Hughes, Ray Gillen and Tony Martin. The original lineup reunited with Osbourne in 1997 and released a live album, Reunion, which spawned the Grammy Award-winning single "Iron Man" in 2000, thirty years after the song's initial release on Paranoid.

Currently, the early 1980s line-up featuring Iommi, Butler, Dio, and Vinny Appice are recording a new album under the moniker Heaven and Hell, a title taken from the 1980 Black Sabbath song and album of the same name.