For decades, Mary Poppins has won the hearts of many cinephiles with its memorable tunes and childlike fantasy.
And now, one movie lover has shared an interesting theory bridging the 1964 Disney classic with an even more magical flick, Harry Potter.
Stick with us here while we explain.
A canny Reddit user suggested that Mary Poppins is in fact a witch who attended Hogwarts and visited the muggle-born Banks' children in a bid to recruit them for the wizarding academy.
The theorist, who goes by the name dannydevito-love, writes: "I believe, although I don't have much evidence to back it up with, that she works at Hogwarts and her job is to help transition muggle born wizards to the wizarding world.
"Specifically, she is sent to families of young witches and wizards who have parents that would likely not accept/believe in magic and would not let their children go to Hogwarts.
"I can't remember if we ever found out in the books how muggle born wizards are told they are magic and how to get to Diagon Alley and Platform 9 3/4 but I don't think a letter would convince a parent like Mr Banks to send their kids off to magic school."
They also said the timing of the movie is "helpful to this theory" as Jane Banks isn't too far from her 11th birthday and could be expecting a letter to Hogwarts, a letter Mr Bank may not be receptive to if it weren't for Mary Poppins.
"So Mary Poppins, and quite likely an entire department of people are sent around the country to help subliminally change the minds of parents," they added.
And that's not all, they also revealed several magical similarities to the wizarding world, such as Mary Poppins' carpet bag behaving similarly to Hermione's bag in Deathly Hallows.
They noted too that the nanny's striped scarf features two orangey colours like that of Gryffindor's house colours and believes Mary's umbrella could be in fact her wand.
The theorist even suggests that Supercalifragilisticexpialidocious could have some magical connection to the wizarding world.
After sharing their detailed theory, many on Reddit agreed with it being plausible.
One user commented: "Yes, Mary Poppins is a witch. A good one. I've been saying this for years. I've never connected her to the Hogwarts world though."
"Very interesting theory. Although I've never seen Mary Poppins, I think this is a fun and quite plausible theory," another added.
I don't know about you but I'm going to need to take a closer look next time it's on!