Múm (stylized in lowercase) (Icelandic pronunciation: [muːm]) is an Icelandic indietronica band whose music is characterized by soft vocals, electronic glitch beats and effects, and a variety of traditional and unconventional instruments.

The band was formed in 1997 by original members Gunnar Örn Tynes and Örvar Þóreyjarson Smárason, who were joined by twin sisters Gyða and Kristín Anna Valtýsdóttir. According to Kristín, the band's name was not intended to mean anything. Gyða left the band to return to her studies after the release of Finally We Are No One. In early 2006, Kristín also left the band, although it was not officially announced until 23 November of that year. With only Tynes and Smárason remaining in the group, a large group of new musicians were brought on board: guitarist/vocalist/violinist Ólöf Arnalds, trumpet/keyboard player Eiríkur Orri Ólafsson, vocalist/cellist Hildur Guðnadóttir, percussionist Samuli Kosminen, and multi-instrumentalist/vocalist Mr. Silla. The new collective of musicians recorded their fourth album during 2006; Go Go Smear the Poison Ivy was released on 24 September 2007.

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