Halløj i operaen was released in the year 1935。Halløj i operaen is also called as A Night at the Opera, Nit a l'ò, Marx Brothers in der Oper, Lyla B'Opera, Kväll på operan, Ilta oopperassa, Galakväll på operan, Uma Noite na Ópera, Noche en la ópera。

The Marx Brothers take on high society. Two lovers who are both in opera are prevented from being together by the man's lack of acceptance as an operatic tenor. Pulling several typical Marx Brothers' stunts, they arrange for the normal tenor to be absent so that the young lover can get his chance.

Halløj i operaen actors and actresses include Chico Marx, Groucho Marx, Harpo Marx, Kitty Carlisle, Sig Ruman。