He played the main character in the film Svartvattnet, which was filmed in Sweden and Norway in 2007. In February 2006, he starred as Wolfgang in Volkswagen's VDub series of television commercials. Stormare voiced Mattias Nilsson in the video games Mercenaries: Playground of Destruction and Mercenaries 2: World in Flames, Isair in the computer game Icewind Dale 2, and Johann Strauss in Quake 4. Before settling on Stormare, he briefly contemplated changing his name to Retep Mrots, which is 'Peter Storm' backwards. Like 'storm' (which has the same meaning in Swedish and English), stormare is a Swedish word meaning 'stormer'. He changed his surname when he discovered he shared it with a senior student at an acting academy. Soon after, his family moved to Arbrå, Gävleborg County.
Stormare was born in Kumla in Örebro County, Sweden.