Former Eurovision Song Contest winners Lordi are making their first film, an English-language horror movie called Dark Floors.
The band have had three number one singles in Finland
Announcing the film in Cannes, frontman Mr Lordi described it as a "traditional modern horror", and promised monsters, plot twists and "horrific scenes".
"Lordi goes to the twilight zone is what you can say," said the singer, whose real name is Tomi Putaansuu.
The Finnish band are famous for wearing gruesome latex masks on stage.
"All of the influences of this image comes from the horror films and the horror genre, so it is kind of natural for this band to have our own horror film," said Putaansuu.
Shooting began earlier this month, and the group expect to release the fright feature in Finland by the end of 2007.
But the movie venture is not the first extra-curricular activity for the hard rock band.
Following their Eurovision success last year they opened a Lordi-themed restaurant, Rocktaurant, in their hometown of Rovaniemi.
Items on the menu include the Lordi Burger and Rudolph's Last Journey - a reindeer sausage.
The band rounded off their Cannes press conference with a short concert including the hit singles They Only Come Out At Night and Who's Your Daddy.