See if you know which celebrities guest-starred in which "Friends" episodes in our exclusive OCN quiz, "The Great 'Friends' Challenge"!

It has been 25 years since Friends—the greatest sitcom of all time—hit the airwaves. After 10 years and 236 episodes, Friends boasts an impressive list of celebrities as guest actors. Here are 25 of our favorites, testing if you're a true fan.


The one who hates it when Joey stinks ...


The one who shows up as a stripper with very little to show ...


The one who's the biggest fan of Dr. Drake Ramoray ...


The one who has the itch ...


The one who sells souvenirs ...


The one who's a spoiled brat ...


The one who's the love machine ...


The one who loves Phoebe ...


The one who thinks Phoebe is Ursula—and vice versa ...


The one whose two worst enemies are Rachel Green and complex carbohydrates ...


The one who is spoiled, rich, and bought a boat for a friend ...


The ones who were born to make everyone laugh ...


The one who is "royalty" (sort of) ...


The one who's the queen of soap opera ...


The one who agrees to a threesome ...


The one who likes coconuts ...


The one who likes bullying Ross and the chick ...


The one who is both a mom AND a dad ...


The one also known as "Sir Spits-a-lot" ...


The one who doesn't like tantrums ...


The one who tops the list but isn't actually on it ...


The one who calms Joey down—but a little TOO much ...


The one you feel sorry for—but not really ...


The one who's too good to be true for Chandler ...