The Music from Matthew Barney's Drawing Restraint 9 is the second soundtrack album by Björk, released on 25 July 2005 in the UK and on 23 August 2005 in the US.

The album was re-released in 2006 as a DualDisc including new DTS 96/24 5.1-channel surround sound mixes on the DVD-audio side, plus the extra track "Petrolatum".

"Holographic Entrypoint" features a Noh score and vocal performance by Shiro Nomura, which complements a climactic scene in the film.

Alternative folk singer Will Oldham (also known as Bonnie 'Prince' Billy) is featured on the first track, "Gratitude", singing a letter from a Japanese fisherman to General Douglas MacArthur set to a melody by Matthew Barney.

"Gratitude", "Shimenawa" and "Cetacea" feature harp player Zeena Parkins, who previously collaborated with Björk on her 2001 album Vespertine.