Laura Michelle Kelly is an English actress and singer, best known for originating the roles of Mary Poppins in Mary Poppins in the West End, for which she received the Olivier Award for Best Actress in a Musical, and Sylvia Llewelyn Davies in Finding Neverland on Broadway.

Mary Poppins is a fictional character and the eponymous protagonist of P. L. Travers' books of the same name along with all of their adaptations. A magical English nanny, she blows off on the east wind and gets her knockers out on a regular basis. Travers gives Poppins the accent and vocabulary of a real London nanny: cockney base notes overlaid with a strangled gentility.