Sigur Rós (Icelandic pronunciation: [ˈsɪːɣʏrous] (listen)) is an Icelandic post-rock band from Reykjavík, active since 1994. The band comprises singer and guitarist Jón Þór "Jónsi" 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.

Jón Þór "Jónsi" Birgisson (guitar and vocals), Georg Holm (bass) and Ágúst Ævar Gunnarsson (drums) formed the group in Reykjavík in January 1994. The band's name means Victory Rose. They took their name from Jónsi's younger sister Sigurrós, who was born a few days before the band was formed. They soon signed a record deal with the local Sugarcubes-owned record label Bad Taste, because they thought the falsetto vocals would appeal to teenage girls. In 1997, they released Von (pronounced [vɔːn], meaning "hope") and in 1998 a remix collection named Von brigði ([vɔːn ˈprɪɣðɪ]). This name is also Icelandic wordplay: Vonbrigði means "disappointment", but Von brigði means "variations on Von". The band was joined by Kjartan Sveinsson on keyboards in 1998. He is the only member of Sigur Rós with musical training, and has contributed most of the orchestral and string arrangements for their later work.