April 21, 2015 1:37 PM EDT
Ellen DeGeneres quizzed Courteney Cox, (aka Monica on Friends ) about the hit TV show as part of a promotion for the Friends- themed version of the party game app “Heads Up!”
Cox appears nervous in the beginning, exclaiming, “I won’t remember!” For the most part, she aces the test, but she does struggle to remember the word Ross shouts as the friends help him move his new couch up the stairs to his apartment (“Pivot!”) and “Ugly Naked Guy, the neighbor across the street who always walks around naked in front of his window.
31 Famous Friends Cameos Brad Pitt – While he was still married to Jennifer Anniston, Brad Pitt played Ross' old high school friend who hated RachelNBC/Getty Images George Clooney – Spoofing his E.R. fame, Clooney plays a dreamy doctor who takes care of Rachel's sprained ankleNBC/Getty Images Adam Goldberg – After Joey moved out, Adam Goldberg played Eddie, Chandler's creepy roommateNBC/Getty Images Aisha Tyler – The Archer star played Charlie, a paleontologist who first dates Joey and then RossNBC/Getty Images Alec Baldwin – Alec Baldwin guest-starred as Pheobe's way-too-enthusiastic dateNBC/Getty Images Anna Faris – Anna Faris had a season-long role as Erica, whose twins Chandler and Monica adoptNBC/Getty Images Ben Stiller – Ben Stiller appeared as Rachel's date who angrily yells at everyoneNBC/Getty Images Billy Crystal – Crystal plays one of two crazy strangers (with Robin Williams) whose conversation the friends overhear at Central PerkNBC/Getty Images Robin Williams – Williams plays that other crazy guy in Central PerkNBC/Getty Images Brooke Shields – Joey ends up regretting going on a date with his crazy stalker played by Brooke ShieldsNBC/Getty Images Bruce Willis – Things get complicated when Rachel starts dating Paul Stevens (Bruce Willis), the father of a student Ross is datingNBC/Getty Images Christine Taylor – Rachel convinces Christine Taylor's Bonnie to shave her head so that Ross will break up with herNBC/Getty Images Christina Applegate – Along with Reese Witherspoon, Christina Applegate played one of Rachel's spoiled sistersNBC/Getty Images Dermont Mulroney – Gavin, played by Dermot Mulroney, fills in for Rachel while she's on maternity leave and later becomes a love interestNBC/Getty Images Charlie Sheen – When Charlie Sheen's Navy man visits Phoebe for an erotic weekend, they both come down with chicken poxNBC/Getty Images Charlton Heston – Charlton Heston plays himself and gives Joey some acting adviceNBC/Getty Images Dakota Fanning – Dakota Fanning offers Joey some advice on how to handle Chandler and Monica moving out of ManhattanNBC/Getty Images Danny DeVito – Danny DeVito plays a stripper at Phoebe's bachelorette partyNBC/Getty Images Freddie Prinze Jr. - Freddie Prinze Jr. is perfect as a sensitive male nanny who takes care of Ross and Rachel's daughterNBC/Getty Images Helen Hunt – In a confusing crossover, Hunt (a Mad About You star) mistakes Phoebe for her twin sister Ursula (a real character played by Lisa Kudrow in both Friends and Mad About You )NBC/Getty Images Hugh Laurie – The stranger sitting next to Rachel on her flight to England (Hugh Laurie) mocks her plan to break up Ross' weddingNBC/Getty Images Jay Leno – Leno plays himself interviewing Chandler's mom, an erotic novelist, on The Tonight Show NBC/Getty Images Jon Favreau – Jon Favreau spent almost a whole season as Monica's super-rich boyfriend who wants to become an Ultimate Fighting ChampionNBC/Getty Images Jon Lovitz – Jon Lovitz guest-starred as a restauranteur in season one and a blind date for Rachel in season 9NBC/Getty Images Julia Roberts – Julia Roberts plays "Susie Underpants," a girl whose skirt Chandler pulled down on stage in elementary schoolNBC/Getty Images Kristin Davis – The Sex and the City star is befriended by Rachel and Phoebe after she starts dating JoeyNBC/Getty Images Reese Witherspoon – Reese Witherspoon guest-stars as Rachel's younger sister who goes on a date with RossNBC/Getty Images Sean Penn – Phoebe must tell her twin sister Ursula's fiancée, played by Sean Penn, that Ursula has been lying to him about her pastNBC/Getty Images Susan Sarandon – In a plot line on Days of Our Lives , Joey gets Susan Sarandon's character's brainNBC/Getty Images Tate Donovan – Real–life couple Jennifer Anniston and Tate Donovan played a couple on the show, tooNBC/Getty Images Tom Selleck – Tom Selleck's mustachioed Dr. Richard Burke dates Monica on-and-off for several seasonsNBC/Getty Images More Must-Reads from TIME Donald Trump Is TIME's 2024 Person of the Year Why We Chose Trump as Person of the Year Is Intermittent Fasting Good or Bad for You? The 100 Must-Read Books of 2024 The 20 Best Christmas TV Episodes Column: If Optimism Feels Ridiculous Now, Try Hope The Future of Climate Action Is Trade Policy Merle Bombardieri Is Helping People Make the Baby Decision