The Most Unforgettable Guest Stars In Television History—How Many Do You Remember?

The Most Unforgettable Guest Stars In Television History—How Many Do You Remember?


June 19, 2026 | Jane O'Shea

The Most Unforgettable Guest Stars In Television History—How Many Do You Remember?


The Guest Stars Who Stole The Show

Some guest stars do more than make a quick appearance. They completely take over an episode and leave viewers talking about it for years. From Brad Pitt's hilariously bitter former classmate on Friends to Betty White's scene-stealing professor on Community and John Lithgow's chilling Trinity Killer on Dexter, these performances became instant TV history.

Screenshot from the television sitcom Friends (1994-2004), Brad Pitt in Cameo Appearance and David Schwimmer as Ross GellerScreenshot from Friends (1994–2004), Warner Bros. Television / NBC

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Stephen Hawking — The Big Bang Theory 

Stephen Hawking appeared as himself in The Big Bang Theory episode “The Hawking Excitation.” The episode centered on Sheldon Cooper’s desperate attempt to meet the legendary physicist. The scene's humor came from Hawking's perfectly timed response, which punctured Sheldon's confidence in an instant. The cameo worked because the show had treated him as one of Sheldon’s heroes from the beginning.

Screenshot from The Big Bang Theory (2007-2019)Screenshot from The Big Bang Theory, Warner Bros. Television Distribution (2007-2019)

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James Earl Jones — The Big Bang Theory

James Earl Jones appeared as himself in The Big Bang Theory episode “The Convention Conundrum.” Instead of playing a distant Hollywood legend, he became Sheldon’s wildly enthusiastic new friend for one chaotic night. The episode sent them through restaurants, karaoke, and a prank on Carrie Fisher. It was a rare cameo that made an icon seem even more lovable.

Screenshot from The Big Bang Theory (2007-2019) Screenshot from The Big Bang Theory, Warner Bros. Television Distribution (2007-2019)

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Carrie Fisher — The Big Bang Theory

Carrie Fisher appeared in the same Big Bang Theory episode that featured James Earl Jones. Her moment was short, but it landed because the show built the joke around decades of Star Wars history. Jones rings Fisher’s doorbell and runs away, leaving her furious on the doorstep. It was quick, goofy, and impossible to forget.

Screenshot from The Big Bang Theory (2007-2019) Screenshot from The Big Bang Theory, Warner Bros. Television Distribution (2007-2019)

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Betty White — Community 

Betty White guest-starred in Community’s season two premiere, “Anthropology 101.” She played Professor June Bauer, an anthropology teacher whose calm academic surface hid some wildly aggressive instincts. The role was a perfect fit for White’s late-career comedy renaissance. She made Greendale feel even stranger, which is saying something.

Screenshot from Community (2009-2015) Screenshot from Community, Sony Pictures Television (2009-2015)

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Robin Williams And Billy Crystal — Friends 

Robin Williams and Billy Crystal made a surprise appearance in the Friends episode “The One With The Ultimate Fighting Champion.” Their scene at Central Perk was brief, but it gave the episode a jolt of pure comic chaos. The two played Tomas and Tim, whose very public emotional meltdown completely hijacked the gang’s conversation. It remains one of the show’s most delightfully unexpected celebrity drop-ins.

Screenshot from Friends (1994-2004) Screenshot from Friends, Warner Bros. Television Distribution (1994-2004)

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Brad Pitt — Friends

Brad Pitt guest-starred on Friends in the 2001 Thanksgiving episode “The One With The Rumor.” He played Will Colbert, a former classmate who still held a serious grudge against Rachel Green. The joke landed even harder because Pitt and Jennifer Aniston were married in real life at the time. His perfectly petty performance earned him an Emmy nomination for Outstanding Guest Actor in a Comedy Series.

Screenshot from Friends (1994-2004) Screenshot from Friends, Warner Bros. Television Distribution (1994-2004)

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Julia Roberts — Friends

Julia Roberts appeared on Friends in the two-part episode “The One After The Superbowl.” She played Susie Moss, a former classmate of Chandler Bing who had not forgotten an embarrassing childhood prank. The episode aired after Super Bowl XXX in 1996 and became one of the most-watched episodes in the show’s history. Roberts turned a revenge plot into one of Chandler’s funniest humiliations.

Screenshot from Friends (1994-2004) Screenshot from Friends, Warner Bros. Television Distribution (1994-2004)

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Bruce Willis — Friends

Bruce Willis appeared on Friends as Paul Stevens, the intense father of Ross’s much younger girlfriend Elizabeth. The role let Willis spoof his tough-guy image while slowly revealing Paul’s vulnerable side. His arc aired across three episodes in 2000. Willis won the Emmy for Outstanding Guest Actor in a Comedy Series for the performance.

Screenshot from Friends (1994-2004) Screenshot from Friends, Warner Bros. Television Distribution (1994-2004)

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Prince — New Girl 

Prince guest-starred as himself in the post-Super Bowl episode of New Girl in 2014. The episode placed Jess and Nick inside a glamorous party at Prince’s mansion, which was exactly as surreal as it sounds. Prince gave romantic advice, played ping-pong, and performed with Zooey Deschanel. Few sitcom cameos have ever felt so specific to the guest star’s real-life mystique.

Screenshot from New Girl (2011-2018) Screenshot from New Girl, 20th Century Fox Television (2011-2018)

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Matt Damon — 30 Rock

Matt Damon appeared on 30 Rock as Carol Burnett, an airline pilot who dates Liz Lemon. The character’s name was already a joke, but Damon played the romance with sincere, nerdy energy. His appearances gave Liz one of her most memorable relationships. Damon’s willingness to be ridiculous made the guest arc feel completely at home on the show.

Screenshot from 30 Rock (2006-2013) Screenshot from 30 Rock, NBCUniversal (2006-2013)

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Oprah Winfrey — 30 Rock

Oprah Winfrey appeared as herself in the 30 Rock episode “Believe In The Stars.” Liz Lemon thinks she is sitting beside Oprah on a flight from Chicago to New York, but the story later reveals that Liz has been talking to a young girl named Pam. The twist fits 30 Rock’s love of celebrity chaos and absurd misdirection. Oprah’s appearance gave the episode the kind of pop-culture electricity that only she could bring.

Screenshot from 30 Rock (2006-2013) Screenshot from 30 Rock, NBCUniversal (2006-2013)

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Jon Hamm — 30 Rock

Jon Hamm appeared on 30 Rock as Dr. Drew Baird, Liz Lemon’s handsome neighbor and brief love interest. The show used him to explore “the bubble,” a world where beautiful people float through life without consequences. Hamm played the cluelessness with total commitment. His guest arc became one of 30 Rock’s most quoted celebrity runs.

Screenshot from 30 Rock (2006-2013) Screenshot from 30 Rock, NBCUniversal (2006-2013)

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Brendan Fraser — Scrubs

Brendan Fraser played Ben Sullivan on Scrubs, appearing in multiple episodes as Dr. Cox’s brother-in-law and close friend. His final appearance in “My Screw Up” remains one of the most emotional episodes of the series. The episode starts with the show’s usual comic rhythm before revealing a devastating truth. Fraser gave Scrubs one of its clearest examples of how comedy can turn serious without losing its soul.

Screenshot from  Scrubs (2001-2010) Screenshot from Scrubs, Buena Vista Television (2001-2010)

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Michael J. Fox — Scrubs

Michael J. Fox guest-starred on Scrubs as Dr. Kevin Casey, a brilliant surgeon with obsessive-compulsive disorder. His episodes balanced physical comedy, professional brilliance, and real vulnerability. Fox’s performance gave J.D. a mentor who was inspiring but never simplified. It remains one of the show’s strongest guest arcs.

Screenshot from  Scrubs (2001-2010) Screenshot from Scrubs, Buena Vista Television (2001-2010)

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John Lithgow — Dexter

John Lithgow joined Dexter in season four as Arthur Mitchell, better known as the Trinity Killer. The character seemed gentle and respectable in public while hiding a horrifying pattern of violence. Lithgow’s performance brought a new level of dread to the series. He won the Emmy for Outstanding Guest Actor in a Drama Series for the role.

Screenshot from  Dexter (2006-2013)Screenshot from Dexter, Paramount Global Content Distribution (2006-2013)

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Britney Spears — How I Met Your Mother 

Britney Spears guest-starred on How I Met Your Mother as Abby, a receptionist at Stella’s dermatology clinic. Her appearance arrived during season three and drew major attention to the sitcom. Spears played Abby with a bubbly awkwardness that matched the show’s heightened comic style. The role became one of the most talked-about celebrity sitcom appearances of the late 2000s.

Screenshot from How I Met Your Mother (2005-2014) Screenshot from How I Met Your Mother, 20th Television (2005-2014)

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Bryan Cranston — How I Met Your Mother

Before Breaking Bad changed his career forever, Bryan Cranston guest-starred on How I Met Your Mother as Hammond Druthers. Druthers was Ted’s arrogant boss at the architecture firm, and Cranston played him with wonderfully smug energy. He later returned to the series after becoming a much bigger dramatic star. The role is now a fun reminder of how strong Cranston’s comedy skills always were.

Screenshot from How I Met Your Mother (2005-2014) Screenshot from How I Met Your Mother, 20th Television (2005-2014)

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Sterling K. Brown — Brooklyn Nine-Nine 

Sterling K. Brown guest-starred in Brooklyn Nine-Nine’s bottle episode “The Box.” He played Phillip Davidson, a dentist being interrogated by Jake Peralta and Captain Holt. The episode stripped away most of the show’s usual ensemble chaos and focused on a tense battle of wits. Brown earned an Emmy nomination for Outstanding Guest Actor in a Comedy Series.

Screenshot from Brooklyn Nine-Nine (2013-2021) Screenshot from Brooklyn Nine-Nine, NBCUniversal Television Distribution (2013-2021)

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Lin-Manuel Miranda — Brooklyn Nine-Nine

Lin-Manuel Miranda appeared on Brooklyn Nine-Nine as David Santiago, Amy Santiago’s brother. The episode “The Golden Child” used him as the perfect embodiment of Amy’s lifelong sibling rivalry. Miranda’s warmth made David charming, while the writing made him just irritating enough to drive Amy wild. It was a smart use of a famous guest star who already loved the show.

Screenshot from Brooklyn Nine-Nine (2013-2021) Screenshot from Brooklyn Nine-Nine, NBCUniversal Television Distribution (2013-2021)

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Michelle Obama — Parks And Recreation 

Michelle Obama appeared as herself in the Parks and Recreation season six finale. The cameo connected directly to Leslie Knope’s passion for public service and civic optimism. Amy Poehler later recalled feeling overwhelmed while filming with the former First Lady. The moment felt like the show’s political heart getting a real-world blessing.

Screenshot from  Parks And Recreation (2009-2015) Screenshot from Parks And Recreation, NBCUniversal Television Distribution (2009-2015)

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Jon Hamm — Parks And Recreation

Jon Hamm appeared on Parks and Recreation as Ed, an employee so incompetent that Leslie Knope fires him almost immediately. The joke worked because Hamm arrived with all the polished authority viewers knew from Mad Men. Parks and Recreation then turned that expectation upside down in seconds. It was a tiny role, but the contrast made it stick.

Screenshot from  Parks And Recreation (2009-2015) Screenshot from Parks And Recreation, NBCUniversal Television Distribution (2009-2015)

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Carol Burnett — Glee

Carol Burnett guest-starred on Glee as Doris Sylvester, Sue Sylvester’s mother. The casting was inspired because Burnett’s comedy legacy matched Jane Lynch’s big, theatrical energy. Their scenes leaned into family bitterness, showbiz flair, and sharp timing. Burnett made Sue’s backstory feel both funnier and stranger.

Screenshot from Glee (2009-2015) Screenshot from Glee, 20th Television (2009-2015)

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Neil Patrick Harris — Glee

Neil Patrick Harris appeared on Glee as Bryan Ryan, a former glee club rival of Will Schuester. The episode gave Harris room to sing, spar, and flash the stage presence that made him a Tony-winning Broadway figure. His performance also won the Emmy for Outstanding Guest Actor in a Comedy Series. It was a guest spot built for someone who could make musical theater jokes land.

Screenshot from Glee (2009-2015) Screenshot from Glee, 20th Television (2009-2015)

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Patrick Stewart — Extras

Patrick Stewart appeared as a fictionalized version of himself on Extras. The joke was that the refined Shakespearean actor pitched Andy Millman a wildly inappropriate movie idea with total seriousness. Stewart’s dignity made the absurdity even funnier. It remains one of the sharpest examples of a celebrity playing a distorted version of their own public image.

Screenshot from Extras (2005-2007) Screenshot from Extras, BBC Studios (2005-2007)

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David Bowie — Extras 

David Bowie appeared as himself on Extras and turned Andy Millman’s insecurity into a song. In the scene, Bowie improvises a mocking tune about Andy in front of a room full of people. The moment was funny because Bowie’s coolness made Andy’s discomfort feel even more painful. It was a cameo that only worked because the guest star was truly legendary.

Screenshot from Extras (2005-2007) Screenshot from Extras, BBC Studios (2005-2007)

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Margo Martindale — BoJack Horseman

Margo Martindale voiced a fictionalized version of herself on BoJack Horseman. The show repeatedly described her as “Esteemed Character Actress Margo Martindale,” then sent her into increasingly reckless criminal chaos. The joke worked because Martindale really is one of television’s most respected character actors. BoJack turned that reputation into one of its most delightfully strange recurring gags.

Screenshot from   BoJack Horseman (2014-2020) Screenshot from BoJack Horseman, Netflix (2014-2020)

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Mark Hamill — The Simpsons 

Mark Hamill appeared as himself in The Simpsons episode “Mayored To The Mob.” The episode placed him inside a Springfield sci-fi convention and later in a dinner theater production. Hamill poked fun at his Star Wars fame while still leaning into the affection fans had for him. It was a perfect example of The Simpsons using a guest star as both celebrity and character.

Screenshot from  The Simpsons (1989-Present) Screenshot from The Simpsons, Fox Broadcasting Company (1989-Present)

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The Best Guest Stars Never Just Wave And Leave

The most unforgettable television guest stars do more than pop in for applause. They change the rhythm of an episode, reveal something new about the regular characters, or bring a little real-world mythology with them. Sometimes the role lasts one scene, and sometimes it reshapes an entire season. Either way, the best ones make viewers say, “I can’t believe that actually happened.”

Screenshot from How I Met Your Mother (2005-2014) Screenshot from How I Met Your Mother, 20th Television (2005-2014)

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Sources:  1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 17


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