Mister Iks

A mysterious man with the name "Mister Iks" performs in a circle, playing violin on a chair suspended in the air by ropes. His breathtakingly sad melodies reflect his internal turmoil – his love for a noble woman, which is frowned upon by society because of his being a circus performer (and therefore a third-class citizen.) A beautiful story of friendship, love, and circus is accompanied by the voices of the actors.

Although the music is from Kálmán's operetta, the setting was changed from Tsarist Russia to France.[5]

• Georg Ots as Mister X
• Marina Yurasova as Theodora Verdier (Princess Fedora Palinska in the operetta, vocals by Tamara Bogdanova)[6]
• Glikeriya Bogdanova-Chesnokova as Karolina (Carla Schlumberger in the operetta)
• Grigoriy Yarhon as Pelican (Samuel Pressburger in the operetta)
• Zoya Vinogradova as Marie Latouche (Miss Mabel Gibson in the operetta)
• Nikolay Kashirsky as Toni (Toni Schlumberger in the operetta)
• Anatoly Korolkevich as Baron de Kreveliyak (Prinz Sergius Wladimir in the operetta)
• Oskar Lints (or Lintz) as Poisson (Count Sakusin in the operetta)
• David Volosov as Director of the circus (Director Stanislawski in the operetta)
• Yefim Kopelyan as a Theodora's fan (uncredited)
• Georgy Kuhlbush as a Theodora's fan (uncredited)
• Gennady Khudyakov as boy servant (uncredited)

• Script writers: Nora Rubinstein, Yuli Khmelnitsky
• Lyrics: Olga Fadeeva (Kálmán's music was used, but all Russian text for songs was changed by Olga Fadeeva).
• Director: Yuliy Khmelnitsky
• Operator: Vladimir Burykin
• Designers: Abram Veksler, Yevgeniy Yeney
• Stage manager: Viktor Sadovsky
• Soundman: Rostislav Lapinsky
• Costume designer: Tamara Levitskaya
• Film editor: N. Razumova
• Circus consultant: Georgy Venetsianov
• Editors: Isaac Glikman, Andrey Donatov
• Trick filming:
  • Operator: B. Dudov
  • Designers: Maria Kandat, Marina Bologovskaya
• Orchestra of the Leningrad Theatre of Musical Comedy
  • Conductor: Mikhail Volovats
• Choreographer: Leonid Travinin
• Film directors: Pyotr Nikashin, A. Dombrovsky

Although the film was based on Emmerich Kálmán's Die Zirkusprinzessin, which had premiered at Theater an der Wien in Vienna on 26 March 1926, significant changes had to be made because the operetta was set in Tsarist Russia and as such had many themes which were unacceptable to the censors.[7] The film was set in Paris, rather than Saint Petersburg, the characters became French, and Mister Iks's Hussar's aria was replaced by a marine aria.[8] The actor Grigory Yaron who played Pelican wrote:

"No Kalman operetta made in the Soviet Union had as many different variants as The Circus Princess. For example, when it first premiered in the Soviet Union, the operetta had one embodiment in Moscow, and another in Leningrad. In Moscow, the troupe's "first comedian" portrayed the Russian Grand Duke Nikolai Nikolaevich in exile in Paris; in Leningrad, he was replaced by a rich American, and Pelican, the restaurant's lackey, turned out to be a Russian general, a White émigré. In further versions of this operetta, the émigrés disappeared."[9]

• Mister Iks at IMDb