Do you know your "unagi" from your "va fa a Napoli"?
Fifteen years ago today, the final episode of 'Friends' ever aired on US television.
With 'Friends' on Netflix now, it's been introduced to a whole new generation, as well as being available for those who loved it to watch it all over again.
So to mark its anniversary, we've got the Ultimate Friends Quiz for you to celebrate.
22 questions and no checking Netflix for the answers!