Green Day is an American punk rock band that was formed in 1987. The band consists of lead vocalist and guitarist Billie Joe Armstrong, bassist and backing vocalist Mike Dirnt, and drummer Tre Cool. Cool replaced former drummer John Kiffmeyer in 1990, prior to the recording of the band's second studio album, Kerplunk.
The band's early releases for the independent record label Lookout! Records earned it a grassroots fanbase. In 1994, its major label debut Dookie became a breakout success and eventually sold over 10 million copies in the U.S. Green Day was widely credited, alongside fellow California punk bands Sublime, The Offspring and Rancid, with popularizing and reviving mainstream interest in punk rock in the United States. Green Day's three follow-up albums did not achieve the massive success of Dookie, though they were still successful, with Insomniac and Nimrod reaching double platinum and Warning reaching gold status. In 2004, their album American Idiot reignited the band's popularity with a younger generation, selling five million copies in the United States. The band's eighth studio album, 21st Century Breakdown, was released in 2009.
Green Day has sold over 65 million records worldwide with 24.639 million in the US alone and won five Grammy Awards. In 2010, a stage adaptation of American Idiot debuted on Broadway. The musical has been nominated for several Tony Awards, including Best Musical and Best Scenic Design, and has received generally positive reviews.
In 2012, the band released a trilogy of albums, ¡Uno! in September, ¡Dos! in November and ¡Tré! in December.