Der Zarewitsch (The Tsarevich) is an operetta in three acts by Franz Lehár. The German libretto by Heinz Reichert and Bela Jenbach is based on the play of the same name by Polish author Gabriela Zapolska. Lehár composed the work, one of his later operettas, as a vehicle for Richard Tauber, the acclaimed Austrian tenor. The work received its first performance at the Deutsches Künstlertheater in Berlin on 16 February 1927, with Tauber and Rita Georg in the leading roles.