Lordi (Finnish pronunciation: [ˈloːrdi]) is a Finnish hard rock and heavy metal band. Formed in 1992 by the band's lead singer, songwriter and costume maker Mr Lordi (Tomi Petteri Putaansuu), Lordi are known for wearing monster masks and using horror elements with pyrotechnics during concerts and music videos. The band rose to fame in 2002 with their hit single "Would You Love a Monsterman?", and won the Eurovision Song Contest 2006 with their song "Hard Rock Hallelujah".

Lordi has toured and recorded actively since 2002, and Mr Lordi upgrades the band's costumes and masks for each album. The band has gone through several line-up changes with Mr Lordi being the only consistent member of the band since their foundation. Members of Lordi have stated their desire for their unmasked faces to remain private. However, they have made a number of unmasked appearances in several news outlets.