Disney has released a new trailer for Mary Poppins Returns. The sequel to the 1964 classic sees Mary Poppins (Emily Blunt) returning to the Banks family as they struggle with a great loss. With the help of lamplighter Jack (Lin-Manuel Miranda), Mary aims to bring joy back into the lives of the Banks. Blunt is perfect as Poppins and the film looks delightfully whimsical and earnest. Mary Poppins Returns opens Christmas Day.