Einar Hrafn Stefánsson (also known as Einar Stef, born September 1, 1992) is the drummer and producer of the Icelandic techno, industrial and punk rock band Hatari. Outside Hatari, he is also the bassist of Vök, an Icelandic indie pop and electronica group formed in 2013. Einar married Sólbjört, a dancer for the group, on July 30, 2023, and they have a daughter together.