Although Walter Bernstein was most anxious to re-establish himself in movies after several years on the blacklist, he asked that his name be removed from the credits of this movie as he disliked it so much. He also insisted to interviewers that a great deal of it was directed by the uncredited Vittorio De Sica, who insisted on being paid in cash at the end of each working day.
The 1960 stereo issue of this movie's soundtrack album (Imperial LP 12068W) is considered one of the rarest in the history of vinyl collecting.
Curiously, one of the fatal flaws of this film's box-office failure was its brilliant cast, particularly the suspension of disbelief required to buy Italian Sophia Loren as the daughter of Frenchman Maurice Chevalier and British Isabel Jeans - all the more challenging to believe when all three characters were supposed to be Austrian.
After Walter Bernstein had his name removed from the credits, the only scriptwriter mentioned for this movie was Sidney Howard, credited with "adaptation". Howard had done an English-language version of Molnar's play for Broadway in the 1920s. By the time this movie came along, he had been dead for over twenty years.
This was the first film directed by Michael Curtiz outside a Hollywood studio since 1926 and was somewhat overwhelmed by Vienna. Sophia Loren found his heavy Hungarian accent and mangled English hard to understand, such as the instruction "Please stand a little closer apart".