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.

Robert William Gary Moore was a Northern Irish musician. Over the course of his career, he played in various groups and performed a range of music including blues, blues rock, hard rock, heavy metal and jazz fusion.