It’s news no one was prepared for. As it turns out, the movie from Home Alone wasn’t a real movie.

You know the one. Kevin McCallister is, well, home alone and decides to order some pizza. He puts in the gangster film Angels With Filthy Souls. He says the famous line to the pizza delivery guy: “Keep the change, ya filthy animal.”

The movie comes up again as part of Kevin’s plot to keep away robbers Harry and Marv.

But it’s all a lie—or at least a bit of cinema magic. The minute-long movie within the movie is completely fabricated. Seth Rogen was the one to deliver the cold, hard truth to people on Twitter.

My entire childhood, I thought the old timey movie that Kevin watches in Home Alone (Angels With Filthy Souls) was actually an old movie. — Seth Rogen (@Sethrogen) December 25, 2018

His revelation was eye-opening to many fans of the holiday film who had also spent decades believing Angels With Filthy Souls was a real film.

I was today years old when I found out that the old gangster movie that Kevin watches in Home Alone, isn’t a real movie. “Angels With Filthy Souls” is a fictional movie within a fictional movie. Merry Christmas, YA FILTHY ANIMALS!!! pic.twitter.com/Ezidu3iPHl — Donny DiMarco (@donnydimarco) December 25, 2018

my whole childhood was a lie,, the movie Angels With Filthy Souls in Home Alone wasn't a real old movie it was filmed for and only for Home Alone pic.twitter.com/GTmL9UzGuf — joe⁷ it's yoongi's month bitches (@joonismynation) December 26, 2018

https://twitter.com/Squizzer85/status/1077728242835042306

My entire [22 years], I thought the old times movie that Kevin watches in Home Alone (Angels With Filthy Souls was actually an old movie. Thanks, Seth. https://t.co/8wEgxa9OyD — David Ramon (@dvr1138) December 25, 2018

Many were shocked.

I knew Angels with Filthy Souls was only made for Home Alone, even after several Google searches. I was less surprised to see everyone freak out about it. It was gonna happen eventually. 🤔 — iSwaggBae 💎 (@iSwaggMaster) December 26, 2018

Us real Home Alone fans have known for over a decade that ‘Angels with Filthy Souls’ and ‘Angels with Even Filthier Souls’ were fictional movies. — Paul (@ThePaul133) December 26, 2018

Apparently I’m one of like 7 people Ok Twitter m that knew Angels With Filthy Souls on Home Alone was a fake movie made to be played inside the movie. pic.twitter.com/YHUnWLqqIi — Jarrod B Cecil (@jarrodbcecil) December 26, 2018

Am I the only one who knew that “Angels With Filthy Souls” was a fake movie? #HomeAlone pic.twitter.com/g92dBZWBYG — Jonathan Apollo (@IAmJonnyApollo) December 26, 2018

Don’t feel bad if you didn’t know, though. Apparently even Macaulay Culkin himself had no clue!

Of course the sequel Angels With Even Filthier Souls, shown in Home Alone 2: Lost in New York, is just as made-up. The original clip made for Home Alone was loosely based off the 1938 film Angels With Dirty Faces, starring James Cagney. The actor who played the character in Home Alone said he even channeled Cagney for the mini role.

Since the fact has graced Twitter, other questions about the Christmas classic have popped up.

1. It is physically impossible to get from Winnetka to O’Hare, check bags, get through security (even in 1990) for an international flight and get on board in 45 mins

2. The Little Nero’s pizza delivery guy should have been arrested for reckless driving — Courtney Cronin (@CourtneyRCronin) December 25, 2018

My two big questions: 1. When did Kevin have time to clean the house before his family came back home? 2. Where’s the dog?#HomeAlone pic.twitter.com/Epd0jJjDkT — J. June House (@JJVHouse) December 26, 2018

I like this thread… But the burning question is: what did Kevin’s dad do for a career? I mean he had a huge house and was able to fly 13 others to Paris (with the adults in First Class) for holiday vacation.#XMas #HomeAlone https://t.co/rAtMaP7Nuv — WTC (@wtcgroup) December 25, 2018

https://twitter.com/_gretz/status/1077746043348045824

Maybe it’s just enough to keep you guessing until you watch the film again next year. Merry Christmas, you filthy animals.

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H/T BuzzFeed News