This was filmed simultaneously in a German language version,
Circus of Love (1954). The cast of the German version can be seen in uncredited cameo appearances in the English language version, and vice versa.
Was supposed to be shot in 3-D, but that was scrapped just before shooting commenced.
The name Willi is mainly a German male name, and (rarely) used in the Scandinavian countries as a female name. It is the name of an actor in the German version of the movie, and the name of the main character in the English version.