A GRUND – Vígszínház Boys' Band was formed on May 1, 2017, and gave its first concert on the 121st anniversary of the Vígszínház (Comedy Theatre of Budapest). The band members are all performers from the theatre's world-premiere production of the hit musical 'A Pál utcai fiúk' (The Boys of Paul street) : József Wunderlich, Márk Ember, Áron Zoltán, Balázs Medveczky, and bandleader Béla Fesztbaum.