Robin Williams (Tomas)
The iconic comedian Robin Williams made a surprise cameo in the cold open of the episode “The One with the Ultimate Fighting Champion,” alongside Billy Crystal. Though brief, the scene is remembered fondly by fans. Known for his roles in Mrs. Doubtfire, Dead Poets Society, and Good Will Hunting, Robin tragically died by suicide. He sadly passed away on August 11, 2014, at the age of 63.
Taylor Negron (Allesandro)
Taylor Negron portrayed Allesandro, the owner of the restaurant where Monica briefly worked as a chef. He only appeared in one episode but made an impression with his comedic delivery. Taylor was a talented comedian, actor, and writer known for roles in Fast Times at Ridgemont High and The Last Boy Scout. He passed away on January 10, 2015, at the age of 57, after a long battle with liver cancer.
Photos: NBC / Getty Posted to: EG, evergreen, Friends, James Michael Tyler, Matthew Perry, Mike Hagerty, Paxton Whitehead, Robin Williams, Ron Glass, Ron Leibman, Slideshow, Stan Kirsch, Taylor Negron, Teri Garr