Þórhildur Steinunn Kristinsdóttir (born 1998) is a student at the Reykjavík Academy of singing and vocal arts, where Harpa Harðardóttir is her teacher. Þórhildur is currently a choir-member of Graduale Nobili but she has been singing with the choirs of Langholtskirkja since the year 2012. Þórhildur has taken part in the Opera academy for young people in Harpa for three years, and has also taken part in student productions of Die Zauberflöte, where she sang the role of second boy, and in Die Fledermaus where she sang the role of Prince Orlofsky.