Applause (musical) resulting musical could not contain any dialogue or characters that had been created for the movie but could use the original material that the movie also used. In April 1969, it was announced that Strouse, Adams, and book writer Sidney Michaels were beginning to work on the show, with Lawrence Kasha producing. In July 1969, movie star Lauren Bacall was cast as aging theater star Margo Channing, the role played by Bette Davis in "All About Eve". Bacall greatly identified with the role, explaining, "The Margo Channing of "Applause" and myself were ideally suited. She was approaching middle age. So
Bette Davis known from early childhood as "Bette", was born on April 5, 1908, in Lowell, Massachusetts, the daughter of Harlow Morrell Davis (1885 - 1938), a law student from Augusta, Maine, and subsequently a patent attorney, and Ruth Augusta (née Favór; 1885 - 1961), from Tyngsboro, Massachusetts. Bette's younger sister was Barbara Harriet. In 1915, Davis' parents separated, and Bette attended a spartan boarding school called Crestalban in Lanesborough in the Berkshires. In 1921, Ruth Davis moved to New York City with her daughters, where she worked as a portrait photographer. Betty later changed the spelling of her name to "Bette"