Mary Poppins in 2004, Walt Disney first attempted to purchase the film rights to "Mary Poppins" from P. L. Travers as early as 1938, but was rebuffed because Travers did not believe a film version of her books would do justice to her creation and did not want an animated cartoon based on it. The books had been a favourite of Disney's daughters when they were children, and he finally succeeded in purchasing the rights in 1961, although Travers demanded and got script approval rights. The relationship between Travers and Disney is detailed in "Mary Poppins She Wrote", a biography of Travers,
Mary Poppins (film) of Mary Poppins soon after she was passed over by Jack L. Warner and replaced with Audrey Hepburn for the role of Eliza Doolittle in his screen adaptation of "My Fair Lady", even though Andrews had originated the role on Broadway. When Disney first approached Andrews about taking on the role, Andrews was three months pregnant and therefore was not sure she should take it. Disney assured her that the crew would be fine with waiting to begin filming until after she had given birth so that she could play the part. Andrews also provided the voice in two other