Sigur Rós is an Icelandic band known for their ethereal sound and unique musical style, which blends elements of post-rock and ambient music. Formed in 1994, the band gained international acclaim with their haunting melodies and atmospheric compositions, often featuring the use of the Icelandic language and a made-up language called Hopelandic. Their albums, such as Ágætis Byrjun and Takk..., showcase a rich tapestry of sound that evokes deep emotions and transports listeners to otherworldly realms. Sigur Rós has also been involved in various film soundtracks, further solidifying their influence in the music world.