The Wall is the eleventh studio album by the English progressive rock band Pink Floyd. It is the last studio album released with the classic lineup of guitarist David Gilmour, bassist/lyricist Roger Waters, keyboardist Richard Wright and drummer Nick Mason before Wright left the band. Released as a double album on 30 November 1979, it was supported by a tour with elaborate theatrical effects, and adapted into a 1982 feature film, Pink Floyd – The Wall. The album features the band's only number one single; "Another Brick in the Wall Part 2".