Eminem performs onstage at the 2014 MTV Movie Awards at Nokia Theatre L.A. Live on April 13, 2014 in Los Angeles.

Marvel fans, listen up. Eminem's got some music up his sleeve for the forthcoming Venom movie.

Shady took to Twitter on Thursday (Aug. 30) to upload a 15-second clip of his song for the film, featuring an explosive beat and the ominous lyrics: "Knock, knock, let the devil in."

Venom, out October of this year, follows the story of one of Marvel's biggest villains discovering his superpowers after he becomes host to an alien parasite.

See Eminem's post below.