Þórunn Gréta Sigurðardóttir received her basic musical education in piano performance at music schools in East Iceland and graduated Junior College Egilsstaðir. She studied piano performance and composition in Reykjavík College of Music and completed a pre diploma in composition in 2008. She furthered her studies in composition at Iceland Academy of the Arts, completing BA in 2011, and at Hochschule für Musik und Theater in Hamburg, Germany, completing M.Mus. in composition in 2014.

She has attended several masterclasses in composition, piano performance and improvisation. She has composed concert music as well as music to installations, video art and animation in collaboration with Icelandic visual artists and poets.