It might seem like the show's cutest love story, but Friends co-creator Marta Kaufman has just revealed that Monica and Chandler were never actually meant to be a thing.
While Ross and Rachel were on again and off again and - at times - pretty annoying, Monica and Chandler were the rock in the middle, moving in, marrying and being generally adorable.
But it turns out that if it weren't for the show's fans, none of that would ever have happened at all, because their fling was only originally meant to be a one-off thing.
"We had no idea what response that was going get," Marta said at the ATX Television Festival.
The studio audience were so shocked, they actually had to break from shooting the scene. "We had to stop [taping] the show because people were screaming."
She added: "We thought it was going to be funny and we were going to get rid of it.
"Suddenly the audience told us they had been waiting for that and we had to rethink how we were going to keep going and change the relationship. But that wasn't a person—it was an entire, immediate expression of joy."
Marta has said before that the main love interest was never meant to be Ross and Rachel or even Monica and Chandler—it was originally going to be Monica and Joey. "They just seemed the most sexual of the characters."
But, in the words of Phoebe, this news about Monica and Chandler is BRAND NEW INFORMATION. Just imagine all of the hilarity we would have missed out on if it had ended after London! Who knows, maybe Rachel would never have got off the plane. It's like Inception-meets-The Butterfly Effect.