My Fair Lady Trivia!

Jeremy Brett, who celebrated his 30th birthday during filming, was very surprised to learn that all of his singing was to be dubbed by a 42-year-old American named Bill Shirley, especially since his own singing voice at that time was remarkably good.

In her 2004 autobiography "Tis Herself", Maureen O'Hara claimed that Jack L. Warner asked her to dub Audrey Hepburn's singing voice in the film.

Rex Harrison wanted Julie Andrews for the role of Eliza, since they had played together in the Broadway version.

When asked why he turned down the role of Henry Higgins, Cary Grant remarked that his original manner of speaking was much closer to Eliza Dolittle.

Cary Grant told Jack L. Warner that not only would he not play Henry Higgins, but if Rex Harrison was not cast in the role, he wouldn't even go see the picture.

Audrey Hepburn herself revealed years later that had she turned down the role of Eliza, the next actress to be offered it would not have been Julie Andrews but Elizabeth Taylor, who wanted it desperately.

In the scene where Eliza is practicing her "H's", she sits down in front of a spinning mirror attached to a flame. Every time she says her "H's" correctly, the flame jumps. If you look closely at the paper she is holding in her hand when it catches fire, you will see handwritten upon it the dialog that she and Professor Higgins have been saying previous to this. "Of course, you can't expect her to get it right the first time," is the first line written on the paper.

An entire sound stage was used for doing hair and makeup for the Ascot race scene.

Rex Harrison was very disappointed when Audrey Hepburn was cast as Eliza, since he felt she was badly miscast and he had hoped to work with Julie Andrews. He told an interviewer, "Eliza Doolittle is supposed to be ill at ease in European ballrooms. Bloody Audrey has never spent a day in her life out of European ballrooms." Nevertheless, Harrison was once later asked to identify his favorite leading lady. Without hesitation, he replied, "Audrey Hepburn in _My Fair Lady (1964)_."