The 6 Most Glaring Differences Between the It Remake and the Novel

Film: The children exit the sewer without incident. Once they reach fresh air, they all cut their hands and form a blood pact: if It ever awakens again, they'll return to kill It once and for all.

Novel: After defeating It, the Losers all get lost in the sewer system and can't find their way out. Beverly decides that they are all too disconnected and they need to reunite as one. So, she has sex with each of them and takes their collective virginity. After their strange sewer orgy, they're united enough to make it out. It's a pretty contentious part of the book, and many feared it would somehow make it into the film. But it was left out entirely.