18 Times Celebs Held Nothing Back And Name-Dropped The Rudest Famous People They've Met

Dealing with rude people is, unfortunately, part of life. Some people get a reputation for being unpleasant, but sometimes, one person's experience with a "rude" person may be totally different than others'.

Here are 18 times famous people called out the worst or rudest celebrities they've met:

1.On a 2015 episode of Watch What Happens Live!, Bill Hader and Jay Pharoah revealed that the worst Saturday Night Live host they worked with was Justin Bieber, who hosted the show in 2013.

Jay Pharoah and Bill Hader on "Watch What Happens Live" show, discussing the worst-behaved musical guest on SNL. Hader mentions Justin Bieber as the worst
Bravo / Via youtube.com

Here's the full clip:

2.On a 2023 episode of her podcast Bitch Sesh, Casey Wilson said that her costar Tim Allen was "such a bitch" to work with on The Santa Clauses. She called it the "worst, truly single worst experience [she's] ever had with a costar ever."

Santa Claus holds up a Polly Pocket toy while Casey's character, in a cardigan, watches him. There is a decorated Christmas tree in the background

3.In a 2022 TikTok, JoJo Siwa revealed that the "rudest celebrity" she's ever met is Candace Cameron Bure.

JoJo Siwa, wearing a sleeveless top, smiles while holding a smartphone with a picture of Candace Cameron Bure on the screen

Watch JoJo's TikTok below:

JoJo Siwa / Via tiktok.com

4.Appearing on The Big Narstie Show in 2022, Mel B called out a few "dickhead" celebrities she's met — James Corden, her Spice Girls bandmate Geri Halliwell, Jessie J, and herself.

A man in a plaid jacket asks, "Who is the biggest dickhead celebrity you have met?" Below, Mel B answers, listing James Corden, Geri Halliwell, Jessie J, and herself
Channel 4 / Via youtube.com
Two image frames: Top shows a man speaking, with a caption, "But Geri — that's your... your former Spice?". Bottom shows Mel B, responding, "I know. I love her to bits, but she's really fucking annoying."
Channel 4 / Via youtube.com
Big Narstie and Mel B on a talk show. Mel B criticizes James Corden, emphasizing the importance of being nice to all crew members
Channel 4 / Via youtube.com

Here's the full clip, with this part starting at the 0:38 mark:

5.In her 2016 book Kathy Griffin's Celebrity Run-Ins, Kathy Griffin wrote, "You'll never convince me to like Jon Hamm. The vibe I've always gotten from him is cold and somewhat disrespectful…toward me. I'm suggesting he's one of these hot guys who's mildly funny but actually thinks he's comedian-level funny."

Kathy Griffin in an elegant gown and Jon Hamm in a tuxedo on the red carpet

6.In Kathy Griffin's Celebrity Run-Ins, Kathy Griffin also shared that Ashton Kutcher was rude to her when they co-hosted a charity event in 2005. She wrote, "At least three separate times, we were standing in the wings, waiting to go out and present, and I'd say something like, 'Hey, what if, when we go out, we do this…,' and suggest something, and he'd just ignore me. If he said five words to me the whole day, I'd be surprised. It was bizarre and rude and made me feel as if he thought I was beneath him, someone not worth talking to in the slightest."

Kathy Griffin and Ashton Kutcher on stage. Kathy holds note cards and wears a velvet jacket. Ashton holds a microphone, dressed in a blazer and light shirt

7.Playing a game of "Stir the Pot" on E! News in 2023, Sharon Osbourne shared that Ashton Kutcher is the rudest celebrity she's ever met.

Sharon Osbourne and Kelly Osbourne discussing the rudest celebrity they’ve met on a talk show; Ashton Kutcher is mentioned

Here's the full clip, with this part starting at the 1:14 mark:

8.On a 2023 episode of Fifi, Fev & Nick for Breakfast, radio host/TV presenter Fifi Box said, "Sharon Osborne has come out and said Ashton Kutcher is one of the least likeable celebrities she's ever met. Now what's interesting about that is — and I have to say, everybody has bad days so when you get asked about the rudest celebrity you've got to acknowledge that somebody might have a bad day — but when I saw Ashton was in hot water, I didn't feel that much sympathy for him because I labelled him my worst celebrity I've ever met."

Fifi Box wearing a ruffled, sheer dress with metallic embellishments and a headpiece, smiles at an event
Fifi Box wearing a ruffled, sheer dress with metallic embellishments and a headpiece, smiles at an event
Ashton Kutcher in a tuxedo at the Breakthrough Prize event
Ashton Kutcher in a tuxedo at the Breakthrough Prize event

Scott Barbour / Getty Images, Anna Webber / Getty Images for Breakthrough Prize

She said, "I asked a very generic question about the movie, and he didn't even look me in the eye, and he said, 'Well, you'll have to ask Michael that. He's sitting next to me'. Well, I did just ask Michael a question, and now I'm coming to you as you're the lead actor."

She also said that, after she asked Ashton about his diet, "He cut me off, blocked me, deferred to the director the whole interview. It was horrible, it was an awful experience."

9.In a 2022 TikTok, Spencer Pratt named Lisa Kudrow as the rudest celebrity he's met.

Two photos of Spencer Pratt. Top text: "Oh, that's easy, Phoebe from Friends." Bottom text: "Hands down, one of the worst humans I've ever come in contact with by far."

Here's Spencer's TikTok:

Via tiktok.com

10.On a 2023 episode of Watch What Happens Live!, the Jersey Shore Family Vacation cast played a game of "Revenge of the Shady Duck Phone." Nicole "Snookie" Polizzi shared her rude encounter with Joy Behar.

Snooki recounts an encounter with Joy Behar on "Duck Phone." She shares how Behar questioned her Italian heritage while referencing the show "Jersey Shore."
Bravo / Via youtube.com

11.On the same episode of Watch What Happens Live!, Deena Cortese and Sammi “Sweetheart” Giancola shared their unpleasant experience with Ryan Reynolds.

Deena says Ryan Reynolds didn't want to sit by them, and Sammi says maybe he was having a bad day
Bravo / Via youtube.com

Here's the full clip, with this part (and Snooki's) starting at the 1:45 mark:

12.On a 2017 episode of The Late Late Show, host James Corden played "Spill Your Guts or Fill Your Guts" with guest Khloé Kardashian. Rather than drink bird saliva, he shared that he had a rude encounter with Pierce Brosnan.

Khloe Kardashian and James Corden discuss a rude celebrity encounter on a talk show. James says Pierce Brosnan pushed him out of the way at a U2 concert
CBS / Via youtube.com

Here's the full video, with this part starting at the 2:20 mark:

13.In 2023, Stephen Mangan told the Telegraph that his "worst celebrity encounter" was with Robert De Niro, who had a cold reaction to Stephen's attempt at making a joke.

Stephen Mangan on the red carpet wearing a dark suit and a light shirt, standing in front of a backdrop with logos and text
Stephen Mangan on the red carpet wearing a dark suit and a light shirt, standing in front of a backdrop with logos and text
Robert De Niro in a dark blazer and polo shirt at the Tribeca Festival, standing in front of a festival-branded backdrop
Robert De Niro in a dark blazer and polo shirt at the Tribeca Festival, standing in front of a festival-branded backdrop

Kate Green / Getty Images for BAFTA, Arturo Holmes / Getty Images for Tribeca Festival

Stephen said, "One of my acting heroes is Robert De Niro, and I once found myself in the same room as him at the Tribeca Film Festival in New York. I am not the kind of person who runs up to everyone I admire. I’m actually a little bit shy. But I thought, 'I cannot miss this opportunity to go and just say hello to him.'

So, I made a start towards him, then I thought, 'No, I can’t do it,' and stopped. Then I went to go and stopped again, then eventually I just strode straight up to him, and said, 'Hello, I’m Robert De Niro.'

There was a pause, and then he said, with no hint of anything other than irritation, 'No, I’m Robert De Niro.' I then made some unintelligible noises, walked away, and that was the end of that. Our paths have never crossed since."

14.At the 2018 Cheltenham Literature Festival, Graham Norton revealed that his worst The Graham Norton Show guest was Robert De Niro. Graham said, "He's not a storyteller, or very verbal. He's a benign presence."

Graham Norton in a suit, seated on
Graham Norton in a suit, seated on
Robert De Niro on BBC One's
Robert De Niro on BBC One's

BBC / Via youtube.com

"Last time he started telling a story — he went on and on. We were all leaning in, willing it to be amazing... Then he finally went, 'Why am I telling this?' Nobody had an answer. We cut it," he said.

15.Freddie Prinze Jr. had such a poor experience with costar Kiefer Sutherland that he almost quit acting. In 2014, Freddie told ABC News, "I did 24, it was terrible. I hated every moment of it. Kiefer was the most unprofessional dude in the world. That's not me talking trash, I'd say it to his face, I think everyone that's worked with him has said that. I just wanted to quit the business after that. So, I just sort of stopped."

Kiefer Sutherland and Freddie Prinze Jr. in a scene from "24," standing on a rooftop with a helicopter in the background. Sutherland wears a leather jacket

16.During a 2024 appearance on Watch What Happens Live!, Valerie Bertinelli shared a poor encounter she had with Christina Aguilera at a Van Halen concert (for context, Valerie was married to Eddie Van Halen from 1981-2007).

Valerie Bertinelli discussing an encounter with Christina Aguilera, sharing she received a cold response when complimenting the singer at a Van Halen concert
Bravo / Via youtube.com

Here's the full clip:

17.In a 2018 Instagram post, comedian Em Rusciano said Gary Body, the lead singer of Snow Patrol, was the rudest celeb she's met because he allegedly spent an entire interview flipping her off.

Em posing on the red carpet in a patterned dress with a deep V-neck and thigh-high slit, with intricate eye makeup and tattoos on one arm
Em posing on the red carpet in a patterned dress with a deep V-neck and thigh-high slit, with intricate eye makeup and tattoos on one arm
Gary Lightbody, wearing a casual long-sleeve top, plays a guitar and sings into a microphone on stage
Gary Lightbody, wearing a casual long-sleeve top, plays a guitar and sings into a microphone on stage

Sam Tabone / WireImage, Kieran Frost / Redferns / Via Getty

She said, "Wippa [Michael Wipfli] and I went to interview them when they were in Perth, and they had that one big song on Grey’s Anatomy ('Chasing Cars'). We got told, ‘Don’t ask him about it because he gets angry,' but we did because that’s all anyone cared about. And he sat for the rest of the interview [with his middle finger up]."

18.And finally, during a 2012 fundraiser event, Jon Stewart reportedly said that Hugh Grant, who visited The Daily Show in 2009, was the worst guest he's had even though he's "had dictators on the show." Jon said, "He's giving everyone shit the whole time, and he's a big pain in the ass."

Jon Stewart holding a microphone, dressed in a suit and tie, making a gesture on a stage during a show taping
Jon Stewart holding a microphone, dressed in a suit and tie, making a gesture on a stage during a show taping
Hugh Grant is smiling while posing on the red carpet, wearing a suit jacket over a dress shirt
Hugh Grant is smiling while posing on the red carpet, wearing a suit jacket over a dress shirt

Brad Barket / Getty Images for Comedy Central, Unique Nicole / FilmMagic / Via Getty

He also said the actor complained about the "terrible" clip his publicist chose to promote Did You Hear About the Morgans?

In response, Hugh tweeted, "Turns out my inner crab got the better of me with TV producer in 09. Unforgivable. J Stewart correct to give me kicking."