19 Celebrities You Totally Forgot Were On "Friends"

Whether or not you liked the show, Friends was THE show of the 90s and early 00s. If you could land a role on Friends, it was a pretty big deal.

Of course, actors like Tom Selleck, Paul Rudd, Anna Faris, Bruce Willis, and Hank Azaria all appeared as recurring characters on the show, but do you remember some of the more famous guest stars?

1. T.J. Thyne

Who he played: One of Phoebe's doctors when she's giving birth to the triplets.

Where he's from: Played Dr. Jack Hodgins on Bones.

2. Hugh Laurie

Who he played: Rachel's annoyed seat-mate on a flight to London

What he's from: House, Stuart Little, among many others.

3. Jason Alexander

Who he played: Earl, a suicidal office manager that Phoebe talks to when she works for a call center.

Where he's from: Seinfeld

4. Charlie Sheen

Who he played: Ryan, Phoebe's Navy lover who gets the chicken pox

Where he's from: Two and a Half Men, Red Dawn, Young Guns

5. Susan Sarandon

Who she played: Jessica Lockhart, Joey's co-star on Days of our Lives

Where she's from: The Rocky Horror Picture Show, Bull Durham, Dead Man Walking, Stepmom

6. Helen Hunt

Who she played: a customer at Central Perk who confuses Phoebe for her twin sister Ursula.

Where she's from: Mad About You, Pay It Forward, Twister

7. Winona Ryder

Who she played: Melissa Warbutron, a college friend of Rachel's who also happened to make-out with her.

What she's from: Girl, Interrupted, Beetlejuice, Edward Scissorhands, Stranger Things

8. Reese Witherspoon

Who she played: Rachel's sister, Jill, who gets cut off

What she's from: Legally Blonde, Cruel Intentions, Big Little Lies

9. Christina Applegate

Who she played: Rachel's other sister, Amy

What she's from: Married With Children, Anchorman, The Sweetest Thing

10. Brad Pitt

Who he played: Monica's friend and president of the I Hate Rachel Club, Will Colbert.

What he's from: Fight Club, Troy Inglorious Bastards, Mr. & Mrs. Smith

11 & 12. Robin Williams & Billy Crystal

Who they played: Tim and Thomas, two bickering friends at Central Perk

What they're from: Williams - Mork & Mindy, Jumanji, Dead Poets Society, Mrs. Doubtfire

Crystal: - City Slickers, When Harry Met Sally, The Princess Bride

13. Julia Roberts

Who she played: Susie Moss, Chandler's childhood friend and present-day date.

What she's from: Pretty Woman, Erin Brockovich, Runaway Bride, Notting Hill

14. & 15. George Clooney and Noah Wyle

Who they played: Dr. Mitchell and Dr. Rosen

What they're from: At the time, ER.

16. Jeff Goldblum

Who he plays: A play director that Joey ends up peeing on.

What he's from: Jurassic Park, Independence Day, The Fly

17. John Stamos

Who he played: Zack, a possible sperm donor for Chandler and Monica (unbeknownst to him)

What he's from: Full House, ER

18. Leah Remini

Who she played: Lydia, a woman giving birth in the hospital and befriends Joey

What she's from: King of Queens, Scientology in general

19. Danny Devito

Who he played: Roy, the stripper for Phoebe's bachelorette party

What he's from: Matilda, Junior, It's Always Sunny In Philadelphia, Batman Returns

Do you remember any other guest stars?