Sharon Osbourne vs. Ashton Kutcher

In September 2023, while playing a game called Stir the Pot with her daughter Kelly Osbourne on E! News, Sharon said the That '70s Show alum was the rudest celebrity she had ever met, branding him, a "rude, rude, rude, rude little boy" and a "Dastardly little thing."

He did not respond to her remarks publicly.

Five years prior, Sharon told Larry King that when Ashton appeared on The Talk in 2014, he had an "attitude" after she got his name wrong.

"He goes, 'What are you, what have you done in this industry?'" she recalled. "And I was like, 'Kid, don't start with me, because I'm gonna eat you up and s--t you out.' So I was just like, 'You don't know what you're dealing with, kid.'"