Green Day is an American rock band formed in Rodeo, California, in 1987, by lead vocalist and guitarist Billie Joe Armstrong and bassist and backing vocalist Mike Dirnt, with drummer Tré Cool joining in 1990. In 1994, their major-label debut Dookie, released through Reprise Records, became a breakout success and eventually shipped over 20 million copies in the U.S. Green Day has been credited with reigniting mainstream interest in punk rock.