Mary Caswell Orr (December 21, 1910 ? September 22, 2006) was an American actress and short story author whose "The Wisdom of Eve", published in the May 1946 issue of Cosmopolitan, was the basis of the Academy Award-winning film All About Eve (1950) directed by Joseph L. Mankiewicz and starring Bette Davis.[1] The nine-page story was loosely based upon a woman who had been the secretary of Viennese actress Elisabeth Bergner.

In private life, the Brooklyn-born Orr used her married name, Mary Orr Denham.

In 1964, she and her husband, director-playwright Reginald Denham, adapted The Wisdom of Eve into a play (of the same name), which was produced off-Broadway in 1979. In 1970, a hit Broadway musical, Applause, was based on All About Eve and gave a credit to Mary Orr for the original story. The musical, which starred Lauren Bacall and Penny Fuller, was broadcast on CBS in 1973.

While Mary Orr did not receive screen credit for her contribution to All About Eve (she had sold the story to Twentieth Century Fox for $5000),[1] she did receive a Screen Actors Guild award for an original story, The Wisdom of Eve.[4] A sequel to All About Eve, More About Eve, made its appearance in Cosmopolitan in 1951.

There is no information about the story available on Wikipedia at this time, but here is a link to the film entry.