Ki A is the fourth album by the English alternative rock band Radiohead, released on October 2, 2000 (2000-10-02) in the United Kingdom and on October 3, 2000 (2000-10-03) in the United States and Canada. A commercial success worldwide,Kid A went platinum in its first week of release in the UK. Despite the lack of an official single or video as publicity, Kid A became the first Radiohead release to debut at #1 in the US. This success was credited variously to a unique marketing campaign, the early Internet leak of the album, or anticipation after the band's 1997 album, OK Computer.