Károly Szemerédy started his singing carreer with the age of eleven years in the children’s choir of the Hungarian State Opera Budapest and completed his vocal studies later on with Hungarian Soprano Margit László next to studying tourism and international relations in his hometown Budapest. He has won several vocal competitions and in 2007 gave his debut as Lowitskij (Boris Godunov) at Teatro Real Madrid where he also sang smaller roles such as Don Basilio (Il Barbiere di Siviglia), Pfleger des Orest (Elektra), First Nazarene (Salome) among others. He then had his first guest appearances at Teatr Wielki Warsaw (Escamillo in Carmen), Teatro Regio Torino, Harasta (Janaceks The Cunning little Vixen) at Opéra de Lyon and in 2013 gave his debut at Bavarian State Opera Munich (Nikititisch in Boris Godunov).
In 2015 he gave a highly acclaimed role debut as King Salomon in the rediscovery of K. Goldmark’s The Queen of Sheba with CD recording (for cpo classics) at German Theater Freiburg and later on at the Hungarian State Opera Munich. This was followed by appearances at Opera Vlaanderen Antwerp (Orest in Strauss‘ Elektra and Dr. Kolenaty in Janacek’s The Makropulos Case), Théatre de la Monnaie Bruxelles, Palau de Les Arts Valencia, Teatro Municipal de Lima (title part in Rossini’s Guillaume Tell), Teatr Wielki Warsaw, Teatro la Fenice Venice, several roles at Opéra de Lyon (Water Spirit in Dvorak’s Rusalka among others) and the Hungarian State Opera Budapest (Michele in Puccini’s Il Tabarro, Mephistopheles in Gounod’s Faust, Escamillo, Jeletzkij in Tchaikovsky’s Pique Dame among others).
In the 2017/2018 season he gave a highly successful debut as Bartók’s Bluebeard and sang Orest in a concert performance of Strauss‘ Elektra at Concertgebouw Amsterdam before giving his debut with the Salzburg Festival (Henze’s The Bassarids). In the beginning of 2019 he returns to Opéra de Lyon singing Shishkov in Janacek’s From the House of the Dead.