King Diamond is a Danish heavy metal band formed in 1985 by vocalist King Diamond, guitarists Andy LaRocque and Michael Denner, bassist Timi Hansen and drummer Mikkey Dee. King, Denner and Hansen had recently departed the group Mercyful Fate, and decided to form a new band under the King Diamond moniker, as it was already known from the initial Mercyful Fate era. Since the band's inception, there have been over fifteen musicians in and out of King Diamond, with the only two mainstays being Diamond and LaRocque. Their current lineup consists of Diamond, LaRocque, guitarist Mike Wead, drummer Matt Thompson, and bassist Pontus Egberg.

Kim Bendix Petersen, better known by his stage name King Diamond, is a Danish rock musician. As a vocalist, he is known for his powerful and wide-ranging countertenor singing voice, in particular his far-reaching falsetto screams. He is the lead vocalist and lyricist for both Mercyful Fate and the eponymous King Diamond. He also plays keyboards and guitars on studio recordings but uses live shows to focus solely on his vocal performance. Diamond is renowned for his dark lyrical content and his story concepts. He is also known for his distinctive shock stage persona. He has been an influence for other rock and metal artists, including Metallica, Slayer and Cradle of Filth.