The camera zooms to a big close-up of Sir Rex Harrison's left eye just before fading to each of Alfred De Carter's infidelity fantasies. Harrison happened to be blind in that eye, the result of childhood measles.
At one point, Detective Sweeney (Edgar Kennedy) mentions "that Italian guy." He is referring to Arturo Toscanini, one of the world's most famous conductors, who, at that time, led the NBC Symphony Orchestra in weekly concerts on the radio. Toscanini had previously conducted the La Scala Orchestra, the Metropolitan Opera Orchestra, and the New York Philharmonic.
The orchestral conductor, Sir Alfred De Carter, was based loosely on the real-life British conductor Sir Thomas Beecham who was the son of pharmacist Sir Joseph Beecham, the inventor of the laxative Beecham's Pills. Accordingly, Sir Rex Harrison's character, Sir Alfred De Carter, is said to be named after Carter's Little Liver Pills, the American equivalent.
Carole Landis, who was dating Sir Rex Harrison at the time, was originally set to play Daphne. Personal problems between them caused her to be replaced by Linda Darnell.
Unfaithfully Yours (1948)' release was delayed because studio officials feared a backlash from the negative publicity surrounding the July 1948 drug overdose suicide of Carole Landis, who was rumored to be having an affair with Harrison, and whose body was found by Harrison at her home.
Unfaithfully Yours (1948)' release was delayed because studio officials feared a backlash from the negative publicity surrounding the July 1948 drug overdose suicide of Carole Landis, who was rumored to be having an affair with Harrison, and whose body was found by Harrison at her home.
Although it is widely hailed as a classic today, Unfaithfully Yours (1948), the first of two produced by Preston Sturges for the studio, was a major box office disappointment when first released. It was also poorly received---the fantasy flashbacks were thought to be too experimental for its time; it was held to be in very poor taste; and admirers of the normally suave Sir Rex Harrison objected to seeing him taking pratfalls and behaving in a frenzied and lunatic manner. It began a downward spiral in the career of Sturges from which he never recovered. However, Harrison always praised both him and the film in later years, calling Sturges one of the very few men of genius he had met in Hollywood.