Der letzte Walzer (The Last Waltz) is a Viennese operetta in three acts, with music by Oscar Straus, to a libretto by Julius Brammer and Alfred Grünwald. It opened at the Berliner Theater in Berlin on 12 February 1920 and starred Fritzi Massary. It was first given in Vienna at the Theater an der Wien on 5 October 1923, with Betty Fischer, Max Hansen, and Richard Tauber in leading roles.