Disney has set the sequel for December 2018

Call it a spoonful of sugar for the holiday season.

Miranda will play a new character, a street lamplighter named Jack.

Both had been reported to be in talks for those roles earlier this year.

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Credit: Jason Merritt/Getty Images; Dimitrios Kambouris/Getty Images

The film will be directed by Rob Marshall and produced Marshall, John DeLuca, and Marc Platt.

It will feature a screenplay by David Magee based onThe Mary Poppins Storiesby P.L.

She and her friend Jack then help the family rediscover the joy and wonder missing in their lives.

I am truly humbled and honored to be asked by Disney to bring P.L.

Travers further adventures to the screen.

She also penned seven additional books starring the no-nonsense British nanny.

Blunt previously worked with Marshall on the big-screen adaptation of the musicalInto the Woods.