Orthodox Celts is a band from Belgrade, Serbia which plays Irish rock music. As a popular band playing Irish music, Orthodox Celts are practically unique not only in Serbia but in the whole of Southeastern Europe and further afield. Despite their unusual music, since their founding in 1993 they have been one of the most popular bands in Serbia. Their music led to a popularisation of Irish and Celtic music and other aspects of Irish and Celtic culture in Serbia, especially Guinness beer. The band members are fans of the Celtic F.C., and some of the band's fans are too.