Emily Blunt and 'Hamilton' Superstar Lin-Manuel Miranda to Headline 'Mary Poppins' Sequel

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Disney announced Blunt will take over for Julie Andrews in a movie that continues P.L. Travers' adventure.

Add a spoonful of sugar and we're already excited about the Mary Poppins sequel.

In this scenario, that spoonful of sugar is Emily Blunt, who will leave behind the very adult drama of Girl on the Train to take over for Julie Andrews as the titular English nanny in Mary Poppins Returns, Disney's sequel to the 1964 classic.

star Lin-Manuel Miranda will join Blunt in the movie, which will be helmed by Into the Woods director Rob Marshall and written by Finding Neverland scribe David Magee, the studio announced on Tuesday.

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"The iconic original film means so much to me personally," Marshall said in a statement. "I look forward to creating an original movie musical that can bring Mary Poppins, and her message that childlike wonder can be found in even the most challenging of times, to a whole new generation."

Here's what Disney is willing to reveal of the plot:

Miranda plays Jack, a street lamplighter, and seeing as the Broadway superstar already has an Emmy, GRAMMY and Tony -- not to mention a Pulitzer Prize -- if Mary Poppins Returns truly is magical, perhaps it'll secure him the Oscar win to complete his EGOT.

Mary Poppins Returns
will fly into theaters on Dec. 25, 2018.

ET recently caught up with a very pregnant Blunt, who revealed that her daughter, Hazel, is "perplexed" about the idea of a sibling. Hear the adorable story in the video below.