Lilian Harvey played Christel in the English, French and German versions of this film. Conrad Veidt played Metternich in the simultaneously filmed English-language version of "Der Kongress tanzt." called "Congress Dances". Pierre Magnier assumed the role in the French version. Lil Dagover, Veidt's co-star in "The Cabinet of Dr, Caligari," played the countess in all three versions.
Posthumously listed as one of Akira Kurosawa's 100 favorite films.
This film's song 'das gibt's nur einmal, das kommt nicht wieder', can also be heard in Miyazaki's Vidas ao Vento (2013).
At over 2 minutes long and without a single cut, the continuous tracking shot of the scene featuring the movie's main song "Das gibt's nur einmal, das kommt nicht wieder" was regarded a formidable technical achievement during this early era of talkies, a feat that not even Hollywood had yet mastered at the time.