Cary Grant refused to wear a smoking jacket for one scene, believing that if the audience saw him dressed that way they would immediately lose sympathy with his character. The director later said that a type of old-fashioned comedy died that day.
Cary Grant's third collaboration with Deborah Kerr. They had previously worked together on Dream Wife and An Affair to Remember.
Originally Cary Grant turned down the role of Victor. Afterwards the role was subsequently offered to his friend Rex Harrison and he accepted. However right before production began, Harrison's wife fell gravely ill and he was forced to leave the production in order to tend to her. Grant, out of respect for cast and crew, and to keep the filming running according to schedule, decided then to finally take the part.
The opening titles were designed by Maurice Binder who, 2 years later, would begin his legendary association with the James Bond series.