24 Friends Guest Stars You Might Have Forgotten About

Bet you forgot that once upon a time, Julia Roberts guest starred on Friends. Or maybe you need a reminder of who Rachel's famous sisters are played by. The well-loved show, which turned 25 years old on Sunday, played host to numerous guest stars over its 10-year run, including some big names who went on to earn Emmy Awards for those guest spots. For a refresher on some of our favorite guest stars, keep reading, and then see how well you actually know the show with this tricky quiz. Only true fans of the Central Perk regulars will prevail!

Brad Pitt as Will Colbert
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Brad Pitt as Will Colbert

In season eight, Brad Pitt shows up as Will Colbert, an old high school acquaintance of Rachel's and Monica's and fellow member of the I Hate Rachel Green Club with Ross.

Julia Roberts as Susie Moss
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Julia Roberts as Susie Moss

Julia Roberts makes an appearance in season two as Susie Moss, someone Chandler knew in school and teased relentlessly. He asks her out, and she exacts her revenge by asking him to put on her underwear. Payback!

Christina Applegate as Amy Green
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Christina Applegate as Amy Green

Christina Applegate plays one of Rachel's sisters, Amy, in seasons nine and 10. She's the one who pierces Emma's ears and insists on calling her Ella. Applegate even won an Emmy for this role!

Ben Stiller as Tommy
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Ben Stiller as Tommy

Ben Stiller plays Tommy in season three's episode "The One With the Screamer," and you guessed it, Tommy is the screamer who Rachel goes on a date with.

Alec Baldwin as Parker
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Alec Baldwin as Parker

Parker, Alec Baldwin's character who goes on a few dates with Phoebe, appears in season eight. Who could forget his blatant enthusiasm for life and his need to take mental pictures of everyone. Click!

Reese Witherspoon as Jill Green
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Reese Witherspoon as Jill Green

Reese Witherspoon famously plays Rachel's other sister, Jill, in season six. She tries to get a little too chummy with Ross, which obviously doesn't fly with Rachel.

Winona Ryder as Melissa Warburton
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Winona Ryder as Melissa Warburton

In season seven, Winona Ryder appears as Melissa Warburton, one of Rachel's old college friends who has been harboring a crush on her for years.

Charlie Sheen as Ryan
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Charlie Sheen as Ryan

Charlie Sheen plays Phoebe's US Navy lover who has returned from sea to reunite with her and doesn't even care that she's plagued with chicken pox.

Ralph Lauren as Ralph Lauren
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Ralph Lauren as Ralph Lauren

Of course Ralph Lauren makes an appearance as himself in season six. Rachel does work for him, after all.

Christine Taylor as Bonnie
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Christine Taylor as Bonnie

Christine Taylor plays Ross's girlfriend Bonnie in season four. Rachel totally tricks her into shaving her head, and she ultimately gets the boot when Rachel decides she wants another chance with Ross.

Gary Oldman as Richard Crosby
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Gary Oldman as Richard Crosby

As actor Richard Crosby, Gary Oldman guest stars alongside Joey in a movie he's filming about soldiers in WWI.

Bruce Willis as Paul Stevens
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Bruce Willis as Paul Stevens

Bruce Willis plays Paul Stevens, the dad to Ross's young girlfriend and casual love interest to Rachel, which makes for some interesting situations in season six. He also won an Emmy for this guest-starring role.

Billy Crystal and Robin Williams as Tim and Tomas
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Billy Crystal and Robin Williams as Tim and Tomas

These two make a quick and funny cameo in season three as Tim and Tomas in Central Perk.

Jon Lovitz as Steve (Twice)
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Jon Lovitz as Steve (Twice)

Jon Lovitz guest stars as Steve in both seasons one and nine. As Steve in season one, he's a restaurant owner whom Monica invites to try her food and he shows up high. As season nine's Steve, he goes on a blind date with Rachel that doesn't exactly go well.

Ellen Pompeo as Missy Goldberg
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Ellen Pompeo as Missy Goldberg

Ellen Pompeo has a guest spot as Missy Goldberg in season 10. She's an old acquaintance of Ross and Chandler from college, and they see her again at their reunion.

Helen Hunt as Jamie Buchman
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Helen Hunt as Jamie Buchman

Helen Hunt plays Jamie Buchman in season one for a short bit mistaking Phoebe for her sister, Ursula.

Anna Faris as Erica
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Anna Faris as Erica

Anna Faris's guest role was a handful of episodes in season 10 as Erica, the pregnant woman who gives Chandler and Monica her babies.

Jennifer Coolidge as Amanda Buffamonteezi
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Jennifer Coolidge as Amanda Buffamonteezi

Who could forget Jennifer Coolidge as Monica and Rachel's old friend Amanda Buffamonteezi in season 10? She's adopts a fake British accent and constantly talks about her mobile phone.

Sean Penn as Eric
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Sean Penn as Eric

Sean Penn plays Ursula's fiancé, Eric, in season eight and even tries dating Phoebe for a hot second.