Scenes & Lines - Robin Williams and his co-star Billy Crystal made a cameo in FRIENDS, Episode 24 - Season 3 (1997). Apparently, all their lines were adlibbed on the spot, as
![Film Still from "Friends" Episode: The One with the Ultimate Fighting Champion Billy Crystal,Robin Williams,Jennifer Aniston,Matthew Perry, & Lisa Kudrow © 1997 Warner File Reference # 31013329THA For Editorial Use Only - Film Still from "Friends" Episode: The One with the Ultimate Fighting Champion Billy Crystal,Robin Williams,Jennifer Aniston,Matthew Perry, & Lisa Kudrow © 1997 Warner File Reference # 31013329THA For Editorial Use Only -](https://c8.alamy.com/comp/PM7HE7/film-still-from-friends-episode-the-one-with-the-ultimate-fighting-champion-billy-crystalrobin-williamsjennifer-anistonmatthew-perry-lisa-kudrow-1997-warner-file-reference-31013329tha-for-editorial-use-only-all-rights-reserved-PM7HE7.jpg)
Film Still from "Friends" Episode: The One with the Ultimate Fighting Champion Billy Crystal,Robin Williams,Jennifer Aniston,Matthew Perry, & Lisa Kudrow © 1997 Warner File Reference # 31013329THA For Editorial Use Only -
![Brad, Pitt, Bruce Willis, John Stamos, Billy Crystal, Robin Williams and more 'Friends' guest stars | Fox News Brad, Pitt, Bruce Willis, John Stamos, Billy Crystal, Robin Williams and more 'Friends' guest stars | Fox News](https://static.foxnews.com/foxnews.com/content/uploads/2024/03/billy-crystal-robin-williams-cast-friends.gif)
Brad, Pitt, Bruce Willis, John Stamos, Billy Crystal, Robin Williams and more 'Friends' guest stars | Fox News
![Brad, Pitt, Bruce Willis, John Stamos, Billy Crystal, Robin Williams and more 'Friends' guest stars | Fox News Brad, Pitt, Bruce Willis, John Stamos, Billy Crystal, Robin Williams and more 'Friends' guest stars | Fox News](https://static.foxnews.com/foxnews.com/content/uploads/2024/03/david-schwimmer-bruce-willis-friends.gif)