Mary Caswell Orr (December 21, 1910 – September 22, 2006) was an American actress and author whose short story "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). In private life, Orr used her married name, Mary Orr Denham.
"The Wisdom of Eve" was loosely based upon a woman who had been the secretary of Viennese actress Elisabeth Bergner. Orr wrote a radio adaptation which aired on NBC in 1949 which led to the movie being made. While she did not receive screen credit for All About Eve (she had sold the story to Twentieth Century Fox for $5,000), she did receive a Screen Writers Guild award for her original story. An alternative hypothesis for the Martina Lawrence-Elizabeth Bergner origin was the rivalry between Tallulah Bankhead and Lizabeth Scott (her understudy) during the production of Thornton Wilder's The Skin of Our Teeth. Broadway legend had it that Bankhead was being victimized by Scott, who was supposedly the real-life Eve Harrington.
In 1964, Orr and her husband, director-playwright Reginald Denham, adapted the short story 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. She wrote a sequel to "The Wisdom of Eve" titled "More About Eve", which was published in Cosmopolitan in July 1951.
In addition to Applause, Mary Orr and Reginald Denham had four plays that opened on Broadway. Their first and most successful, Wallflower, ran for 192 performances in 1944. Round Trip was presented in 1945, while Dark Hammock started its performances in 1946. The fourth, Be Your Age, made its Broadway appearance in 1953. She also acted in Broadway plays, including two of her own: Wallflower and Dark Hammock. The film version of Wallflower was released in 1948.
Alone or with her husband, Orr wrote five books and forty television scripts.
- Diamonds in the Sky (1957)
- A Place to Meet (1961)
- The Tejera Secrets (1974)
- Rich Girl, Poor Girl (1975)
- Lucky Star (1986)
- Margalit Fox (October 6, 2006). "Mary Orr, 95, an Author Who Inspired 'All About Eve', Is Dead". The New York Times.
- Awards-Mary Orr
- Sam Stagg (St. Martin's Press, 1st edition, March 18, 2000), All About "All About Eve," pp. 319–335
- Mary Orr, "The Wisdom of Eve," Cosmopolitan, May 1946, pp. 72–75, 191–95
- Bruce Kirle (Southern Illinois University Press; 1st edition, October 24, 2005), Unfinished Show Business: Broadway Musicals as Works-in-process, p. 191
- Dorothy Kilgallen (Thursday, June 24, 1943), "The $64 Questions," The Voice Of Broadway, Times Herald (Olean, New York), p. 13
- Mary Orr at the Internet Broadway Database
- WOSU presents Ohiana Authors: Mary Orr
- Wallflower on IMDb