Hildur Ingveldardóttir Guðnadóttir (born 1982 in Reykjavík) is an Icelandic composer and cellist. She works at the intersection of contemporary music, electronics and soundtrack composition. She gained international recognition through her film scores for Joker (2019) and Tár (2022) as well as the series Chernobyl. Her works combine minimalist composition, sound research and emotional precision.