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The Tsarevich is a 1933 German historical musical film directed by Victor Janson and starring Mártha Eggerth, Hans Söhnker and Ery Bos. It is based on the 1927 operetta Der Zarewitsch by Franz Lehar. It was one of a number of operetta film that Eggerth appeared in during the decade. The film's sets were designed by Walter Haag and Franz Schroedter. A separate French-language version Son Altesse Impériale was also released. Wikipedia