Alice in Wonderland is a 1951 British-American animated musical fantasy comedy-adventure film produced by Walt Disney Productions and based primarily on Lewis Carroll's Alice's Adventures in Wonderland with several additional elements from Through the Looking-Glass. The 13th in the Walt Disney Animated Classics series, the film was released in New York City and London on July 26, 1951. The film features the voices of Kathryn Beaumont (who later voiced Wendy Darling in the 1953 Disney film Peter Pan) as Alice, and Ed Wynn as the Mad Hatter. The theme song, "Alice in Wonderland", has since become a jazz standard. While the film was critically panned on its initial release, the movie proved to be ahead of its time and has since been regarded as one of Disney's greatest animated classics, as well as one of the best film adaptations of Lewis Carroll's novel.