27 Major Stars You Might Have Forgotten Were On Friends

Witherspoon plays Rachel's sister Amy Green

Witherspoon plays Rachel's sister Jill Green

Anna Faris was the birth mother of Monica and Chandlers children

President and founder of the I Hate Rachel Club right here

This comedy duo made a cameo in an episode opening

You may not recognize him because he provides just the voices of Simpsons characters Moe, Apu, Wiggum, etc

Our second Simpsons vet, the voice of Homer! (and Grandpa, Barney, Krusty, etc)

Pre Suite Life of Zack and Cody, this Sprouse played Ben Geller

Aisha Tyler plays recurring character Charlie

Remember when Ross broke that girl scout's leg?

"Something's wrong with the left phalange!"

Selleck plays the ever mustachioed Richard

Stamos would make the perfect potential sperm donor. I mean look at him!

You probably know her for playing Lois Griffin on Family Guy

Dr. Leo Spaceman makes an appearance.

Another 30 Rock vet finds his way to friends

Remember this positive fella?