In 10 seasons, the producers of the series have appeared in a handful of episodes. For example, in the first episode of season 3, they take the friends’ famous coffee shop couch. Also, you can see Marta Kauffman and Adam Chase in the scene where Joey and Chandler are riding the bus in London in the episode where Ross gets married.

By the way, in the very same episode, you can see Sarah Ferguson, the former wife of Prince Andrew. She agreed to take part in the show because her daughters, princesses Beatrice and Eugenie, were huge fans of the series.