While filming, Blunt got to work with the legendary Dick Van Dyke, who appeared in the 1964 Mary Poppins movie with Andrews.

\"He's got more energy than anybody in this room and when he got up on that desk and started tap dancing I thought, 'This is it. If I die today I will have seen the best thing in my life,'\" Blunt said of Van Dyke.

She added, \"He's still got it. He's amazing.\"

“If I die today, I will have seen the best thing in my life” #EmilyBlunt on seeing the amazing #DickVanDyke tap dance in #MaryPoppinsReturns! @MaryPoppins https://t.co/W1vUNMab63 pic.twitter.com/E14CJS88py

— Good Morning America (@GMA) December 17, 2018

Blunt said she and her whole family movie to London to shoot the movie. She even asked husband John Krasinski not to wear so many baseball caps so he'd fit in with the Brits.

\"I just think that if he wants to blend in in England, you should not wear a baseball cap because no body wears baseball caps in England,\" Blunt said. \"Look at him--what an American!\"

“Most people cry when they see this movie\"

Note to those going to see #MaryPoppinsReturns: BRING TISSUES. https://t.co/W1vUNMab63 pic.twitter.com/vKMUjVJg49

— Good Morning America (@GMA) December 17, 2018

Word has it that Krasinski cried during the film, but Blunt says it's not an extraordinary thing for viewers to shed tears.

\"Most people cry when they see this film--even my most cynical of friends,\" she said. \"My dad too. My dad, truly it was a memory I will have on my deathbed because he doesn't cry and he was overcome. He just was beetroot red from trying not to cry when he saw me.\"

\"It was so moving,\" Blunt added of her father. \"It was so, so special.\"

Only 5 days left until #MaryPoppinsReturns. On December 19, see why critics are calling it “pure joy.” Get your tickets now! https://t.co/qF95Mqwiql pic.twitter.com/Lqto598kXN

— Mary Poppins (@MaryPoppins) December 14, 2018
\"PHOTO:
Ian Gavan/Getty Images
PHOTO: Emily Blunt attends the "Mary Poppins Returns" European Premiere at the Royal Albert Hall, Dec. 12, 2018, in London.
>

Blunt said her \"cool factor hits the sky\" when she does her Mary Poppins voice for her daughters.

\"I'm going to dine out on that until they're teenagers and I become inevitably uncool,\" she joked.

\"Mary Poppins Returns\" is in theaters on Wednesday.

The Walt Disney Company is the parent company of ABC News.

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