10 BEST Celebrity Cameos In Friends
1. Robin Williams & Billy Crystal
How could it be anything else?
Technically, yes, it's two cameos, but they happened at the same time and neither one would have worked without the other.
At the beginning of "The One With The Ultimate Fighting Champion", Williams and Crystal appear as Tomas and Tim, and the gang (along with the entire audience) eavesdrop on their bizarre conversation.
They force they way onto the sofa where they sit beside the gang, then proceed to talk loudly about topics such as adultery, gynecology, and Tomas' "oozing wound".
It's more than a little jarring in the best possible way, and gives the six friends a brief reminder that they aren't the only people in New York with entertaining lives.
Seeing Williams and Crystal work their magic in such a way is a thing of beauty, and it's something that remains funny no matter how many times you watch it.