According to her autobiography, Myrna Loy was originally going to wear white empire-style dress for the party sequence, but Jeanette MacDonald was jealous of how she looked insisted that she had to wear it herself instead. Loy surrendered the dress, but then went down the to the costume room and, with a friend's help, put together the black lace outfit she wears in the final film. She stole the scene.
First film to use a zoom lens
For its post Production Code re-release (after 1934), this film was trimmed down to 96 minutes. Those missing minutes have never been restored and are presumed lost.
Among the deletions in the film's 1949 reissue was Myrna Loy's portion of the "Mimi" reprise. In the Production Code era, Miss Loy's negligee was deemed too revealing.
The death of Marice Chevalier's mother during the production reportedly affected the actor's work on the film.