Shia LaBeouf has stripped off for the latest video from Icelandic band Sigur Ros. The Transformers actor appears in the video for ' Fjögur Píanó', the latest single from the band's Valtari album under the direction of director Alma Har'el.

LaBeouf (along with a blonde actress) appears fully nude in the decidedly avant-garde video and apparently his stripping off was entirely unplanned, instead occurring spontaneously during the shoot.

See the 8 minute long video below and BEWARE that it's not safe for work!