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.
My Fair Lady (1964)
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Directed by: George Cukor
Starring: Audrey Hepburn, Rex Harrison, Wilfrid Hyde-White, Stanley Holloway
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More mistakes in My Fair Lady
Eliza Doolittle: I ain't dirty! I washed my face and hands before I come, I did.
Trivia: Audrey Hepburn was not the only voice that was dubbed. The actor who plays Freddy had his voice dubbed as well, so in their scene together with the song 'show me' neither of them are singing.
Question: The song, "Get Me To The Church On Time," mentions "roll up the floor." What does that mean?
Answer: It just means put away (roll up) the dance floor so that he won't be distracted with dancing when he has to be at the church on time.
Bishop73