The "You're All the World to Me" dance was accomplished by putting a whole room, with attached camera and harnessed cameraman, inside a 20-foot-diameter rotating "squirrel cage."
In an interview given shortly after the film was released, Fred Astaire revealed that he had tried dancing with more than 30 commercially available hat racks before the studio had the prop department design and build the one in the film at a final cost of over $900 (over $9000 in 2021 dollars). The hat rack disappeared shortly after the film wrapped.
Retitled "Wedding Bells" in England so as not to make it appear to be a documentary of the recent wedding of Princess Elizabeth, later to become Queen Elizabeth II.
The royal wedding being celebrated in the film is that of Princess Elizabeth to Prince Philip on November 20, 1947.
The ship's rocking during "Open Your Eyes" was based on Fred Astaire and Adele Astaire's experience on a voyage to London in 1923. A boat-rocking device was used to create the film effect.