Mary Poppins is a 1964 American musical fantasy comedy film directed by Robert Stevenson and produced by Walt Disney, with songs written and composed by the Sherman Brothers. The screenplay is by Bill Walsh and Don DaGradi, based on P. L. Travers's book series Mary Poppins. The film, which combines live-action and animation, stars Julie Andrews in her feature film debut as Mary Poppins, who visits a dysfunctional family in London and employs her unique brand of lifestyle to improve the family's dynamic. Dick Van Dyke, David Tomlinson, and Glynis Johns are featured in supporting roles. The film was shot entirely at the Walt Disney Studios in Burbank, California, using painted London background scenes.

Mary Poppins was released on August 27, 1964, to critical acclaim and commercial success, earning $44 million in theatrical rentals in its original run. It became the highest-grossing film of 1964 in the United States, and at the time of its release became Disney's highest-grossing film. During its theatrical lifetime, it grossed over $103 million worldwide. It received a total of thirteen Academy Award nominations—a record for any film released by Walt Disney Studios—including Best Picture, and won five: Best Actress for Andrews, Best Film Editing, Best Original Music Score, Best Visual Effects, and Best Original Song for "Chim Chim Cher-ee". It is considered Walt Disney's crowning live-action achievement and is the only one of his films to earn a Best Picture nomination during his lifetime. In 2013, it was selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant."

A biographical drama based on the making of the film, Saving Mr. Banks, was released on October 20, 2013. A sequel, Mary Poppins Returns, was released on December 19, 2018.