Mary Poppins Returns development hell since the release of the 1964 film. Walt Disney attempted to produce a sequel a year subsequent to the film's release, but was rejected by author P. L. Travers, who had openly dismissed Disney's film adaptation. In the late 1980s, then-chairman of Walt Disney Studios Jeffrey Katzenberg and vice-president of live-action production Martin Kaplan approached Travers with the idea of a sequel set years after the first film, with the Banks children now as adults and an older Mary Poppins with Julie Andrews reprising the role. Travers again rejected the proposed concept with the exception of Andrews' return.
Mary Poppins (film) condense the story into feature length. In the film, there are only two Banks children, Jane and Michael. The satirical and mysterious aspects of the original book gave way to a cheerful and "Disney-fied" tone. Mary Poppins' character as portrayed by Andrews in the film is somewhat less vain and more sympathetic towards the children compared to the rather cold and intimidating nanny of the original book. Bert, as played by Van Dyke, was a composite of several characters from Travers' stories. Travers demanded that any suggestions of romance between Mary and Bert be eliminated, so lyrics were written for