The Croatian singer with Italian roots studied at the Giuseppe Tartini Conservatory in Trieste, at the Royal Academy of Music in London and at the State University of Music and Performing Arts in Stuttgart with Dunja Vejzović.
The artist has been constantly expanding her already extensive repertoire to include soprano roles and has already enjoyed great success as ‘Elettra’ in “Idomeneo”, ‘Leonora’ in “Il Trovatore”, in the soprano role in Paulus (Mendelssohn), and as ‘Desdemona’ in “Otello” (Rossini) at the Bad Wildbad Festival.
In 2025/26, Diana Haller will be heard in such diverse roles as ‘Madame Cortese’/”Il viaggio a Reims”, ‘Mère Marie’/”Les dialogues des Carmelites”, the title role in “Maria Stuarda”, and the soprano part in Verdi’s Requiem.
Highlights of the previous season included her role debut as ‘Fremde Fürstin’/”Rusalka”, her return to the Theater an der Wien in the operetta ”Das Spitzentuch der Königin”, and concerts in Rijeka, with the Bavarian Radio Symphony Orchestra, in Lisbon, and in Stuttgart, among others. Future roles include the title role in Norma.
After a year in the opera studio of the Stuttgart State Opera, Diana Haller became the youngest member of the ensemble in the 2010/11 season. The artist could be heard there in her wide-ranging repertoire, which includes roles from baroque to bel canto to parts by Richard Strauss. In 2021, she was awarded the title of Kammersängerin at this house. Guest engagements have taken the singer to the Salzburg Festival, the Handel Festival in London, the Bregenz Festival, the Rossini Festival in Bad Wildbad, where she received the prestigious Belcanto Prize, the Savonlinna Festival and the opera houses in Zurich, Dresden, Milan, Strasbourg, Cologne, Hamburg and Frankfurt, among others.
The winner of numerous international competitions, including 1st prize at the 8th International Competition for Lied Art at the Hugo Wolf Academy and the 5th Manhattan International Competition, she is equally in demand as a Lied and concert singer and can be heard on all major concert stages. In concert she works with conductors such as Philippe Herreweghe, Jordi Savall and Diego Fasolis as well as with the symphony orchestras of the WDR, MDR and NDR and the orchestra of the Komische Oper Berlin.
At the Maggio Fiorentino she sang Mahler’s 8th Symphony under Fabio Luisi, as well as the same symphony at the Bregenz Festival under the direction of Kirill Petrenko. She has given recitals at the Hugo Wolf Academy, at the Stuttgart Opera, at the Eppan Song Festival, at the Schubertiade Hohenems, in Mexico, at the National Theater in Rijeka, in Vienna, Zagreb and elsewhere.
Her discography includes works by Handel and Bach (Bavarian Radio Choir/Concerto Köln), a solo album with songs by Schumann and Wolf, Gounod’s “Faust” (‘Siebel’) for Universal Music, and the solo album ‘Echoes of the Grand Canal’ with the Ensemble Diderot.
Since 2023, Diana Haller has held a teaching position at the State University of Music and Performing Arts (Opera School/Master’s program), and since July 2025, she has been the first chair of the Kammeroper Weissenhorn, where she also serves as musical director