Green Day is an American punk rock band formed in 1986 by vocalist/guitarist Billie Joe Armstrong and bassist Mike Dirnt. For much of their career, the band has been a trio with drummer Tré Cool, who replaced former drummer John Kiffmeyer in 1990 prior to the recording of the band's second studio album, Kerplunk (1992). In 2012, guitarist Jason White became a full-time member after having performed with the band as a session and touring member since 1999.