Although it's been off the air for thirteen - count them, THIRTEEN - years, Friends is still as popular as ever.
That's down to the fact that A) it's arguably the greatest sitcom of the modern generation and B) Comedy Central re-runs.
But what went on behind the scenes? Did Jennifer Aniston actually earn more money than all of them? What was up with the mirror thing on the door?
We've come up with 13 pieces of useless trivia, one for each year it's been off the air. Take a look!