It has been on our TV screens since the mid 1990s with many of us knowing the words to our favourite scenes off by heart. But despite watching Jennifer Aniston, Courteney Cox, Lisa Kudrow, Matt LeBlanc, Matthew Perry and David Schwimmer more times than we could care to admit, some fans are still spotting mistakes and mix-ups they've never noticed before.
With David Schwimmer, AKA Ross, baking up a storm on The Great British Bake Off many people have found themselves searching out the old episodes - and those tuning into series nine have spotted something very, very odd about everyone's favourite fashion expert - Rachel Green.
