Hildur Guðnadóttir has been played over 20 times on NTS, first on 24 January 2015. Hildur Guðnadóttir's music has been featured on 22 episodes.

Hildur Ingveldardóttir Guðnadóttir (born 4 September 1982) is an Icelandic musician and composer. A classically trained cellist, she has played and recorded with the bands Pan Sonic, Throbbing Gristle, Múm and Stórsveit Nix Noltes, has collaborated with Sunn O))) and toured with Animal Collective. In 2020, she won the Academy Award for Best Original Score for her work on the film "Joker".

In 2006, she released a solo album under the name Lost In Hildurness, Mount A, on which she attempted to "involve other people as little as I could." It was recorded in New York City and Hólar in the north of Iceland. 2009 saw the release of her second solo album, Without Sinking, on the UK-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 (2012), Garth Davis' 2018 film Mary Magdalene (in collaboration with Jóhann Jóhannsson), Stefano Sollima's Sicario: Day of the Soldado (2018), and the 2019 Chernobyl miniseries. Most recently she scored the Joker film starring Joaquin Phoenix, directed by Todd Phillips. For her work on Joker, Hildur won the BAFTA for Best Film Music, Golden Globe for Best Original Score and an Academy Award for Best Original Score.