Green Day is an American punk rock band formed in 1986 by vocalist/guitarist Billie Joe Armstrong and bassist Mike Dirnt. Green Day has sold over 65 million records worldwide with 25 million in the US alone. The group has won five Grammy Awards: Best Alternative Album for Dookie, Best Rock Album for American Idiot, Record of the Year for "Boulevard of Broken Dreams", Best Rock Album for the second time for 21st Century Breakdown and Best Musical Show Album for American Idiot: The Original Broadway Cast Recording. In 2010, a stage adaptation of American Idiot debuted on Broadway. Their newest album, Never Too Old, was released in 2016.