Klára Kolonits was born in Budapest to a family of musicians; her grandfather Dénes Bartha was professor of musicology and founder of the subject of Musicology at the Franz Liszt Music Academy of Budapest.
In 1995 she received her soloist diploma with award from the Franz Liszt Music Academy in Budapest. Between 1995 and 2003 she was member of the Csokonai Theater in Debrecen and received a scholarship at the Hungarian National Opera. She took part in a long tour through the Netherlands as guest soloist of the Szegediner National Theater. Later she was guest soloist at the Operetta Theatre in Budapest and sang the primadonna roles of Franz Lehár´s and Emmerich Kálmán´s operettas in German in Budapest, Frankfurt, Leipzig and München.
Since 2003 she has been soprano soloist at the Hungarian National Opera in Budapest. Her recent roles have included the Countess (The Marriage of Figaro), Violetta, Fiordiligi, Gilda, the ‘heroines’ of The Tales of Hofmann, Mimi and Nanetta (Falstaff).