Which Film Were You Shocked To Find Out Was Based On A Book?

Guys, SHREK WAS BASED ON A BOOK.

We all know that adapting a book into a screenplay can make for a seriously great movie, and books have given us some truly beloved classics.

TriStar Pictures

But sometimes you find out a movie was based on a book, and you're all like, "Whoa, what?!" Like, I just found out Shrek was based on a book and I am not OK, tbh.

DreamWorks Pictures

Maybe it's just that the story was more well-received as a movie, or maybe it was published as a book under a completely different title.

Doubleday

Doubleday

Do Androids Dream of Electric Sheep became Blade Runner, which is totally different.

Whatever it is, blow our minds in the comments of this post, and your submission could be featured in a future BuzzFeed Community post or video!