More Famous Faces on 'Friends' Quiz

Answer: George Clooney and Steve Zahn

Clooney appeared as a emergency room doctor with his 'ER' co-star, Noah Wyle. Zahn played a gay friend of Phoebe's who she married so he could get a green card.

Answer: Fergie

Joey ran into Fergie while he was exploring London after Chandler ditched him. Joey videotaped Fergie with him to show everyone (and to rub it in to Chandler).

Answer: Helen Hunt and Leila Kenzle

Ursula was a painfully bad waitress and when Phoebe blows off Jamie (Hunt) and Fran (Kenzle) at Central Perk it just plays into them thinking she is Ursula.

Answer: Sean Penn

Eric and Ursula break up and he and Phoebe try to date, but it doesn't work out -- the twin thing causes lots of problems. Azaria and Rappaport both played love interests of Phoebe in earlier seasons. Favreau played Pete, the millionaire Monica dated in the third season.

Answer: Kristin Davis

Joey initially wasn't all that interested in Davis's character, Erin, but Phoebe and Rachel really liked her and persuaded Joey to give her a chance.

Answer: Jennifer Grey and Charlie Sheen

Grey played Mindy, Rachel's maid of honor at her aborted wedding to Barry Farber, who later marries Barry herself. (Although in the episode where Barry and Mindy marry Jana Marie Hupp plays Mindy.) Sheen played Phoebe's Navy fling in 'The One with the Chicken Pox.' Sheen and Ruck now appear together on 'Spin City.' They didn't have any scenes together in 'Ferris Bueller's Day {Off';} Grey was the only primary cast member that Sheen appeared with in the movie.

Answer: Jennifer Saunders and June Whitfield

Saunders played Emily's mother, and Whitfield played the Waltham's housekeeper who tries to install some phone manners in to Phoebe. On 'Ab Fab,' Saunders plays the egocentric Edina Monsoon, and Whitfield plays her mother.

Answer: Ralph Lauren

Phoebe asked to use Rachel's copier at work and then claimed that she kissed Ralph Lauren. It was really 'Kenny the copy boy' pretending to be Lauren, but Phoebe didn't know this.

Answer: Brooke Shields

All of these women have appeared on the show, but Shields was the stalker. Apparently, Shields's performance in this role led to her getting the deal for a television show that resulted in 'Suddenly Susan.'

Answer: Elliott Gould

Gould has been appearing on the show as Mr. Geller since the first episode. Christina Pickles plays Monica and Ross's mother.

Answer: Gary Oldman

Joey ended up performing the wedding ceremony in his bloody soldier's uniform from the movie set. At the reception he changed into the best thing he could buy at the gift shop -- a white tennis outfit.

Answer: Jon Lovitz

Phoebe arranged for Monica to audition as a chef for Lovitz's character and was horrified that he 'lit up a doobie' in the cab on the way over.

Answer: Teri Garr

Later, when Phoebe is considering being a surrogate mother for Frank Jr. and Alice, Phoebe Sr. temporarily gives her a puppy to try to show her how hard it will be to give up a baby.

Answer: Christine Taylor and Ben Stiller

Stiller appeared as the titular screamer in 'The One with the Screamer.' Taylor appeared as Phoebe's friend Bonnie. Bonnie and Ross were dating and Rachel convinced Bonnie to shave her head again, which freaks Ross out. Witherspoon appeared as Rachel's sister Jill. Goodacre appeared as herself, trapped in an ATM vestibule with Chandler during the blackout, but Ryan never appeared.

While Freddie appeared as Emma's male nanny in 2002, Sarah never appeared on "Friends".

Answer: Jay Leno

Ross kisses Chandler's mother in this episode, which leads to some strife between the friends and to these words of wisdom from Joey -- 'You don't kiss your friend's mom. Sister's are okay, maybe a hot-lookin' aunt, but not a mom. Never a mom.' In a later episode, Joey kisses Rachel's mom, but it was to keep Rachel's fighting parents from seeing each other.