Gjuro Prejac (Desinić, 25th November 1870 - Zagreb, 19th January 1936) was Croatian composer, actor and director.

He was born on 25th November 1870 in Desinić (Croatian Zagorje). He was surrounded by music from early age because his father Gjuro, teacher in elementary school, played the organ in the local parish church.

He leaves Desinić after the elementary school to attend the gymnasium in Varaždin, from where he will arrive to Zagreb, to learn the fine art craft. Having met the Zagreb theatre scene, he became more and more part of the theatre world: he helped at various, mostly physical work behind the scenes, learned privately acting and prepared for his first role. Not even the military service in Sarajevo interrupted his theatre work, but during this three Sarajevo years he acts musically and as director leading a theatre group and a choir. 

After returning from Sarajevo he begins intensive work on his acting and musical education, and enrols the Croatian drama school (predecessor of today’s Academy of drama arts), which was founded in 1896 by Stjepan Miletić, while at the same time he privately learns solo singing at Ivan Zajc. During his rich career he was appointed to the intendant of the Croatian national theatre in Osijek, worked as the director and actor at the Croatian national theatre in Zagreb, and was also a teacher at the school of Croatian music institute. He is the author of the comedies Zajutrak (breakfast), Tko je mrtav (Who is dead) and Znatiželjni tast (Curious father in law), he composed the operettas Vječni ženik (Eternal bridegroom), Apaš kavalir (Apache Cavalier) and Mis Eva (Miss Eva), and his most famous songs are Vu plavem trnacu (In blue orchard) and Pehraček moj (My little cup), for which he wrote music and lyrics.

He said goodbye to his audience in 1935, almost 10 years after formal retirement, and on that occasion his piece Vječni ženik (Eternal bridegroom) was performed for the first time, under the direction of Tito Strozzi and lead of conductor Lovro von Matačić. He died the following year at the age of 65.