During the latest episode of Uproxx's 'In Theory' this week, a compelling theory was brought up about Mary Poppins possibly being linked to the Harry Potter Universe. With her magical bag, enchanted umbrella, cleaning spells, and ability to transport people into paintings, its possible "the world?s most famous nanny" may have been a Hogwarts student herself. Fans always love to find connections and crossovers between the things that they love, and the idea that Mary Poppins could have once attended the same school as Harry Potter is certainly a very interesting theory.