Sky Valley Mistress are an English rock band from Blackburn, Lancashire, formed in 2012 and currently consisting of Kayley "Hell Kitten" Davies and Max "Leather Messiah" Newsome. They have been described musically as heavy rock and stoner rock with influences ranging from Black Sabbath to Queens of the Stone Age. After two early EPs, they released their debut studio album Faithless Rituals in 2020 as a quartet. It was followed nearly six years later with Luna Mausoleum (2026) as a duo, which charted on the UK Independent Albums Chart at no. 30.