Emily Blunt will play the no-nonsense nanny with the catchy songs in a sequel titled "Mary Poppins Returns," according to a press release sent out by Disney on Tuesday.
Also starring is creator of Broadway hit "Hamilton," Lin-Manuel Miranda, who will play a new character, a lamplighter named Jack.
According to the release, the story will take place in Depression-era London and follow Jane and Michael Banks - the kids whom Poppins looked over in the first movie, now grown - along with Michael's three children. They're all visited once more by Poppins following a personal loss.
The film will be directed by Oscar nominee Rob Marshall ("Chicago," "Into the Woods") and come out on Christmas Day, 2018.
The original "Mary Poppins," released in 1964 and based on a series of children's books by P.L. Travers, was revolutionary for the time as it melded live action and animation. It went on to win Oscars for original score, special effects, and best actress for Andrews.
The film has a lifetime gross of over $100 million (that would be over $670 million by today's ticket prices).