Deliberate mistake: When Eliza is about to be bathed, the mirror keeps turning around between shots to avoid reflecting the filming crew.
My Fair Lady (1964)
1 deliberate mistake - chronological order
Directed by: George Cukor
Starring: Audrey Hepburn, Rex Harrison, Wilfrid Hyde-White, Stanley Holloway
Visible crew/equipment: When Professor Higgins is having Eliza practice saying the letter H by blowing into a tube to make the flame waver, the paper she's holding is actually Rex Harrison's lines. Once the paper starts to burn and the camera angle changes, you can read them and it's practically all of his lines for the whole scene.
Professor Henry Higgins: Why can't a woman be more like a man?
Trivia: In the 40th anniversary re-mastered edition they have used Audrey Hepburn's original singing track for the "Wouldn't it be lovely" song.
Question: Why would Zoltan Karpathy think that Audrey Hepburn is "born Hungarian, possibly of royal birth" when her name is Eliza Doolittle?
Answer: He knows that Professor Higgins is trying to pull a fast one by having Eliza pretend to be someone else, and he fancies himself as much of a linguistic expert as Higgins. He's correct that there's something going on; he just gets the wrong end of the stick and assumes she's "high born," thus proving Higgins right that he could "train" Eliza to pass as upper class.