It's difficult to imagine anyone but Julie Andrews in the role of film's most famous nanny, but Emily Blunt is bravely taking on the role of Mary Poppins in a new sequel to the 1964 movie.

The first trailer for 'Mary Poppins Returns' has just been released, and also stars Lin-Manuel Miranda as Jack the Lamplighter as we're transported back to 1930s London.

The plot sees Mary Poppins returns to the same house on Cherry Tree Lane, where she's greeted by Jane and Michael Banks - who are now grown up (and played by Emily Mortimer and Ben Whishaw).

You'll have to wait until Christmas to see the whole thing, but watch the teaser below: