American Idiot is the seventh studio album by American rock band Green Day. Produced by Rob Cavallo, the album was released in the UK on September 20, 2004 and in the US on September 21, 2004 by Reprise Records. Green Day first achieved popularity in the 1990s with a string of successful albums. Following disappointing sales of their sixth album, Warning (2000), the band took a break before recording their next album, titled Cigarettes and Valentines, a process cut short when its master tapes were stolen. Rather than re-record that material, the group decided to start over.