"Grimly Fiendish" was a single released by The Damned in 1985. The band had been offered a deal by a major label, MCA, and moved further in the direction of goth music under the influence of guitarist/keyboardist Roman Jugg and vocalist Dave Vanian. Given a substantial promotional budget, including a video directed by Jonathon Gershfield, two separate 12" releases (each featuring a different remix of "Grimly Fiendish") and several limited edition 7" variants, the song was the band's biggest hit since 1979, reaching No. 21 in the UK Singles Chart in April 1985.