Matej Kastelic (1994) has studied Music Theory and Classical Singing on Conservatory for Music and Ballet Ljubljana. He is currently studying at the Academy of Music in Ljubljana - he is a Master's degree student of Composition by prof. Uroš Rojko,
as well as Music Theory and Pedagogy. His compositions, mainly choral works, were performed worldwide at festivals and choral competitions such as Canti veris Praga (Czech Republic), Montreux Choral Festival (Switzerland), Tolosa EGP (Spain), EFYC Basel (Switzerland), Taipei ICF (Taiwan), Russia, Poland, Sweden, Italy, Austria, Croatia, Hungary. He also composed music for theatre to Sofokles Antigona and short opera to his own libretto Anatomy of thoughts.