Mammút is a 5-piece band from Reykjavik, Iceland formed in 2003 as a trio named ROK highlighting vocalist Kata (Katrína Kata Mogensen). Initially the band was an all girl band. But early in 2004, the band expanded into 5 members by including guitarist Arnar Pétursson and drummer Andri Bjartur Jakobsson and adopting the new name Mammút. The band is considered an indiepop, indierock, post punk and psychedelic alternative Icelandic band.
Mammút won 'Músiktilraunir', the Icelandic annual battle of the bands in 2004. The band enjoys popularity in Iceland and internationally. Mammút's eponymous debut album was released in Iceland in 2006 on Smekkleysa label founded by The Sugarcubes. The follow-up album was 'Karkari' in 2008. The album included 'Svefnsýkt', that became the band's first major hit with immense radio play and charting in Iceland. With Karkari, the band was nominated for Best Band during the Icelandic Music Awards in 2008.
On its tenth anniversary, the band has released its third album 'Komdu til mín svarta systir' in 2013.