Sigur Rós are an Icelandic band formed in Reykjavík in 1994, known for their ethereal sound, bowed guitar textures, and expansive, cinematic compositions. The lineup includes Jónsi, Georg Holm, and Kjartan Sveinsson across key periods. Their music blends post-rock, ambient, and classical influences, often featuring falsetto vocals and invented language called Hopelandic. Albums like Ágætis byrjun and () brought international acclaim. Their sound emphasizes atmosphere, emotion, and gradual build, creating immersive listening experiences. Sigur Rós have influenced many artists with their unique approach to texture, mood, and composition in modern experimental music.