The mezzo-soprano Arnheiður Eiríksdóttir graduated in 2016 from the Bachelor's program of the University of Music and Performing Arts Vienna with highest honors with Univ.-Prof. Mag.art Sebastian Vittucci as her main teacher. She was subsequently accepted to their Master's program, on which she is now studying. Arnheiður attended masterclasses with singers such as Barbara Bonney, Anna-Sofie von Otter, Kurt Equilutz and Snezana Brzakovic as well as an acting workshop with the Commedia dell'Arte specialist Markus Kupferblum.
In 2014 she made her debut as Cherubino from Le Nozze di Figaro in Schloßtheater Schönbrunn in Vienna and was subsequently invited to sing the same role with the EinKlang Philharmonie in Germany. Since then she has performed roles such as Andronico in Händel's Tamerlano, Dorabella in Mozart's Cosi fan tutte (at the Daegu Opera house in S-Korea), Ecclitico in Haydn's Il mondo della Luna (with the Hainburger Haydn society in Austria), Meg Page in Verdi's Falstaff and Mercedes in Bizet's Carmen. From the autumn of 2018 Arnheiður will be a member of the Opera studio of the Cologne opera house in Germany.
Arnheiður has performed with choirs since an early age as a member and as a soloist singing repertoire ranging from Bach's St. John Passion, Händel's Messiah and Mozart Requiem to world premieres of modern pieces by Icelandic and Austrian composers. She also sang background vocals on Björk's album Biophilia and during the following world tour.