Aside from Blunt, Colin Firth has also joined the project, set to play Bank president, William Weatherall Wilkins, and Hamilton's Lin-Manuel Miranda has been cast as Bert's equivalent - a street lamp lighter called Jack - even Meryl Streep has been given a cameo. Following a family tragedy, Michael's three children - Annabel, Georgie, and John - are left joyless and in need of a spoonful of sugar. It will see the Banks children, Jane and Michael, all grown up and played by Emily Mortimer and Ben Whishaw.
And Miranda will play a lamplighter whose part in the story seems to echo the part of the chimney sweep in the original.
The upcoming live-action adaptation of "The Lion King" just got a little more real.
Blunt said that Mary Poppins is more acerbic, odd and vain in the books, and they pay more homage to that in the new movie.
Taking to Twitter, Walt Disney Studios shared a video of Emily Blunt in character, captioning it: "Emily Blunt is Mary Poppins in the upcoming sequel, #MaryPoppinsReturns". "I had to do my version of her. And we were very loyal to the books", Emily said.
"As a kid, I found the idea that this magical mysterious person whisking into their lives and making everything right again really comforting", said Blunt.
Mary Poppins [Emily Blunt] then appears out of the clouds to assist the family after they suffered a tragic loss, and help the family rediscover joy and happiness.
Marshall revealed that he was unaware that Mary Poppins author P.L. Travers had penned seven other novels featuring the character until he was approached about this movie.
Directed by Rob Marshall, with songs from the duo of Marc Shaiman and Scott Wittman (Hairspray), Mary Poppins Returns will premiere on December 25, 2018. "This is a brand new original film musical from top to bottom, which is very rare, and it is a wonderful opportunity to create something specifically for the screen", Rob added.