Donald Smith Airey is an English musician who has been the keyboardist in the rock band Deep Purple since 2002, after the retirement of Jon Lord. He has had a long and productive career, playing with such acts as Gary Moore, Ozzy Osbourne, Judas Priest, Black Sabbath, Jethro Tull, Whitesnake, Saxon, Wishbone Ash, Colosseum II, Ten, Sinner, Michael Schenker, Rainbow, Empire, Brian May, Divlje jagode and Living Loud. He has also worked with Andrew Lloyd Webber.

Deep Purple are an English rock band formed in London in 1968. They are considered to be among the pioneers of heavy metal and modern hard rock, although their musical style has varied throughout their career. Originally formed as a psychedelic rock and progressive rock band, they shifted to a heavier sound with their 1970 album Deep Purple in Rock. Deep Purple, together with Led Zeppelin and Black Sabbath, have been referred to as the "unholy trinity of British hard rock and heavy metal in the early to mid-seventies". They were listed in the 1975 Guinness Book of World Records as "the globe's loudest band" for a 1972 concert at London's Rainbow Theatre and have sold over 100 million records worldwide.