AC/DC are an Australian rock band formed in Sydney in 1973. Their music has been variously described as hard rock, blues rock and heavy metal, although the band calls it simply "rock and roll". They are cited as a formative influence on the new wave of British heavy metal bands. The band was inducted into the Rock and Roll Hall of Fame in 2003.

AC/DC were founded in 1973 by brothers Angus (lead guitar) and Malcolm Young (rhythm guitar), with Colin Burgess (drums), Larry Van Kriedt (bass guitar) and Dave Evans (lead vocals). They underwent several line-up changes before releasing their debut Australasian-only album, High Voltage (1975). Membership stabilised after the release of Let There Be Rock (1977), with the Young brothers, Phil Rudd on drums, Cliff Williams on bass guitar and Bon Scott on lead vocals. Seven months after the release of Highway to Hell (1979), Scott died of alcohol poisoning and English singer Brian Johnson was then recruited as their new frontman. Their first album with Johnson, Back in Black (1980), dedicated to Scott's memory, became the second best-selling album of all time. The eighth studio album, For Those About to Rock (1981), was their first album to reach number one on the Billboard 200. Rudd was fired partway through the Flick of the Switch sessions in 1983 and was replaced by Simon Wright, who was replaced by Chris Slade six years later.

AC/DC experienced a commercial resurgence in the early 1990s with the release of album The Razors Edge (1990); it was their only record to feature Slade, as Rudd returned in 1994. Rudd has since recorded five more albums with the band, starting with Ballbreaker (1995). Their fifteenth studio album, Black Ice, was the second highest-selling record of 2008 and their highest chart peak since For Those About to Rock, eventually reaching number one worldwide. The band's line-up remained the same for 20 years until 2014 when Malcolm retired due to early-onset dementia, from which he died three years later; additionally, Rudd was charged with threatening to kill and possession of methamphetamine and cannabis. Angus and Malcolm's nephew, Stevie Young, replaced Malcolm and debuted on the album Rock or Bust (2014). On the accompanying tour, Slade filled in for Rudd. In 2016, Guns N' Roses singer Axl Rose replaced Johnson for the rest of the tour dates due to a risk of hearing loss, Williams retired at the end of the tour and the band entered a two-year hiatus. A reunion of the Rock or Bust line-up was announced in September 2020; the band's seventeenth studio album, Power Up, was released two months later. Their supporting tour was announced in February 2024, with drummer Matt Laug replacing Rudd, and bass guitarist Chris Chaney replacing Williams.

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