The '90s sitcom "Friends" remains a touchstone in television history. Whether you've recently discovered it on Netflix or you've been quoting it your entire life, here are 20 facts about the filming of "Friends" that will probably surprise you.
SEE ALSO: Cast of "Friends" ranked by net worth
FOLLOW US: INSIDER is on Facebook:
Ross and Rachel were always endgame.

Ross (David Schwimmer) and Rachel (Jennifer Aniston) may have become the quintessential "will they won't they" couple in pop culture, but there was never any doubt in David Crane and Marta Kaufmann's minds that they wouldn't end up together.
Even when looking at alternative endings, it seemed impossible for them to end the show with Ross and Rachel completely over. "We did talk about, with Ross and Rachel, a gray area of where they aren't together, but we hint there's a sense that they might be down the road," explained Crane to Entertainment Weekly. "But we thought, 'No, if we're going to do it, let's do it.' It's the nature of our show. It's not a show about grays. Let's deliver not just what the audience wants, but what we want, which was to see them finally together."
Monica and Joey were originally meant to end up together.

"Friends" co-creator and executive producer Marta Kauffman explained to the Hollywood Reporter that a lot of aspects of the show changed as natural chemistry developed between cast members. "You set out to do things, and then actors come in and they breathe life into it, and it's not quite what you imagined it was going to be," said Kauffman.
For instance, Monica (Courtney Cox) and Chandler (Matthew Perry) were only supposed to get together briefly before she was slated to end up with Joey (Matthew LeBlanc). But when Monica and Chandler did get together on screen, viewers had such an enthusiastic response to the pairing that the Joey and Monica plotline was discarded.
"We were stunned," said Kauffman. "So that's when we sort of went, 'Huh, guess this is going in a different direction.'"
Jennifer Aniston was the last of the main six to officially join the cast.

Now one of the most sought-after actresses in Hollywood, Jennifer Aniston was still new to acting when they filmed the pilot of "Friends." Aniston revealed to Us Weekly that she was the last of the six main cast members to be added onto the series.
Unsure of her longevity on the show, she was asked to sit out of the main cast photos for the majority of the shoot because producers did not know if she would stay on as Rachel.
Aniston proved herself to be integral to the cast and would go on to win an Emmy for her performance as Rachel Green.
See the rest of the story at INSIDER