Sigur Rós is an Icelandic post-rock band from Reykjavík, active since 1994. The band comprises singer and guitarist Jón Þór Birgisson, bassist Georg Holm, and keyboardist Kjartan Sveinsson. Known for their ethereal sound, frontman Jónsi's falsetto vocals, and their use of bowed guitar. Sigur Rós incorporate classical and minimal aesthetic elements.