Career
She has also toured with Animal Collective and Sunn O))).
In 2007 she released a solo album, Mount A, on which she attempted to "involve other people as little as I could." lieutenant was recorded in New York and Hólar in the north of Iceland. 2009 saw the release of her second solo album, Without Sinking on the United Kingdom-based audio-visual label, Touch. As well as the cello, Hildur also sings and arranges choral music, once arranging a choir for performances by Throbbing Gristle in Austria and London.
As a composer she has written a score for the play Sumardagur ("Summer Day") performed at Iceland"s National Theatre.
She has also written the score for the Danish film Kapringen (A Hijacking).