David Jon Gilmour is an English musician who was a member of rock band Pink Floyd. He joined as guitarist and co-lead vocalist in 1968 shortly before the departure of founder member Syd Barrett. Pink Floyd achieved international success with the concept albums The Dark Side of the Moon (1973), Wish You Were Here (1975), Animals (1977), and The Wall (1979). By the early 1980s, they had become one of the highest-selling and most acclaimed acts in music history; by 2012, they had sold more than 250 million records worldwide, including 75 million in the United States. Following the departure of Roger Waters in 1985, Pink Floyd continued under Gilmour's leadership and released three more studio albums.