Members of Sigur Rós have teamed up with Icelandic composer Hilmar Orn Hilmarrson to score The Show of Shows, an upcoming BBC documentary chronicling the history of vaudeville, circuses and carnivals. Watch the trailer above, which features select music from the film.

For the documentary, Sigur Rós bassist Georg Holm, drummer Orri Páll Dýrason and touring guitarist Kjartan Holm collaborated with Hilmarrson on a 14-song, 72-minute instrumental soundtrack, Circe. The album is slated for an Aug. 21 release via the Icelandic band’s own Krunk Records. It will be made available as a CD, double-LP and digital download. You can pre-order it at this location. Check out the artwork below:

Krunk Records

Two screenings of The Show of Shows are planned for July 16 at the Barbican Cinema in London and July 17 at Latitude Festival in Suffolk. Get details on the band’s website.

Sigur Rós have previously worked with Hilmarrson on a soundtrack for the 2000 film, Angels of the Universe, and again in 2002 on the unreleased composition, “Odin’s Raven Magic.”

Sigur Rós’ most recent album, Kveikur, arrived back in 2013. The band have plans to reissue their 1999 sophomore full-length, Ágætis byrjun, as a deluxe, limited-edition box set. It’s yet to receive an official release date, but it’s expected sometime this summer. You can opt into updates here.