Director Blake Edwards admitted in an interview that he "chickened out", and added the scene in which King Marchand (James Garner) discovers that Victoria (Julie Andrews) is indeed a woman. Originally he was to fall in love with Victoria before he was sure about her gender, hence his line "I don't care if you are a man" before he kisses her.
The cockroaches were in a kind of deep freeze coma. They were placed where necessary for the scene and heated with a hair dryer. The crew could only hope that they went in the right direction and no one knew quite where they went after filming of the scene was completed.
Tom Selleck was approached by Blake Edwards to star with Julie Andrews in the film, but he was indecisive about accepting the part. By the time he agreed to appear, he was already locked into a tight shooting schedule for "Magnum, P.I." (1980) - the same reason he was unable to star in Raiders of the Lost Ark (1981).
Robert Preston did the final musical number in one take.
Julie Andrews recreated her role in 1995 in the Broadway production of Victor/Victoria.
The Broadway musical "Victor Victoria" based on the movie opened at the Marquis Theater on October 25, 1995 and ran for 734 performances. Liza Minnelli substituted for Julie Andrews while she was on vacation and Raquel Welch took over for her when she left the show.
During the "Le Jazz Hot" rehearsal sequence, the choreographer who appears to help "Victor" run through the steps is actually choreographer Paddy Stone. He would also appear uncredited as "The Devil" in the surrealistic "Night Wind Goes To Hell" scene in Edwards' bitch-slap at Hollywood, S.O.B. (1981).
Lorimar was originally supposed to produce the film, but after seeing that it would cost $20 million, they turned the rights over to MGM.
Rumors that Tom Selleck was at one time under consideration to play King Marchand were denied by Blake Edwards, who insisted that his first and only choice for the role was James Garner.
The film had been planned as early as 1978 with Julie Andrews to star alongside Peter Sellers, but Sellers died in 1980 while Andrews and Edwards were filming S.O.B. (1981).