Many of the Oscar-nominated special effects pioneered by this film were employed later on similar projects requiring actors to play their own twins, including The Parent Trap (1961), The Patty Duke Show (1963), and Bette Davis' unofficial remake of this film, Dead Ringer (1963).
This film, along with his previous post-war picture, Gilda (1946), relaunched Glenn Ford's career after spending two years in the U.S. Marines during World War II.
This film's special visual effects, which allowed two images of Bette Davis to seamlessly appear in a single frame and carry on conversations with one another, were nominated for an Academy Award but lost out to the ethereal fantasy Blithe Spirit (1945).
First film of Bette Davis as a producer under her new contract with Warner Brothers. (Note the "A B.D. Production" in the opening credits.) Davis left the day-to-day work of producing the film to others, but she did choose this project, and hired the writer and director.
This was the last film Bette Davis made at Warner Brothers (during her contract from 1932-1949) to make a profit upon release.