Roger Rasmussen (born 12 October 1974), better known by the stage name Nattefrost, is a Norwegian musician, best known for being the vocalist and a founding member of black metal band Carpathian Forest.

His first musical ventures were with the black metal band The Childmolesters, which he founded in 1990 alongside his future Carpathian Forest bandmate Johnny "Nordavind" Krøvel.

In 2000 Nattefrost formed his first side project, World Destroyer, alongside Eivind Kulde and his Carpathian Forest bandmate Daniel Vrangsinn.

His second album, Terrorist (Nekronaut, Part I), came out in the following year and counted with guest appearances by numerous musicians, such as Carl-Michael Eide, Sanrabb of Gehenna and Hoest of Taake.

In 2016 he collaborated with Urgehal, providing vocals and lyrics for the song "Endetid", off their seventh album Aeons in Sodom.