Casanova is an operetta in three acts by Ralph Benatzky with music by Johann Strauss II and the libretto by Rudolph Schanzer and Ernst Welisch. Its first performance was on 1 September 1928 at the Großes Schauspielhaus in Berlin.
Casanova was one of a series of spectacular "revue-operettas" Benatzky wrote for producer and revue director Erik Charell at the Großes Schauspielhaus. The star-studded original cast of Casanova included Michael Bohnen, the well-known opera bass-baritone in the title role, Anni Frind, Anny Ahlers, Paul Morgan, and Siegfried "Sig" Arno. La Jana was a dancer, and the Comedian Harmonists appeared there with enormous success.