LOS ANGELES, CALIFORNIA: Sharon Osbourne is renowned for her unfiltered honesty. During a recent appearance on E News with her daughter, Kelly, the duo engaged in a game called 'Stir the Pot.'

When asked to name the rudest celebrity they've ever met, Osbourne, 70, had a prompt response, even though she could not quite recall the celebrity's name.

"The guy that's married to an actress and he used to do That 70s Show," she said.

Sharon Osbourne says Ashton Kutcher is the rudest celebrity

Kelly answered, "Oh, Ashton Kutcher? Really?" "Yes. Oh, rude, rude, rude, rude little boy," Osbourne said of Kutcher.

Osbourne's straightforward comment caught the interviewers and Kelly off guard, and they openly admitted they were "not prepared for that" response.

A stunned Kelly asked her mother again, "Really?" "Yes. Dastardly little thing," Osbourne admitted, without offering any details.

Osbourne had previously voiced her dislike for Kutcher during an interview on 'Larry King Now' in 2018.

She recounted an incident from her former show, 'The Talk', that had not gone well, shedding light on her unfavorable impression of the actor.

"I didn't get on with one guy, that Ashton Kutcher," she said, adding, "Didn't get on with him at all."

She further said, "Bad attitude, for me, for me," adding that she "got his name wrong" on the show and that started things off on a bad foot.

Sharon Osbourne regrets dissing Justin Beiber

In another segment of the 'Stir the Pot' clip, Osbourne revealed that she had regrets about making negative comments about Justin Bieber in the past.

She said, "I have apologized to him before, and it's Justin Bieber, because he did something."

She continued, "And when I was doing another talk show, I said, you know, 'He's really bad,' and, 'How can his parents let him do that?' and all of that, and I'm like, who am I to say that he's bad?"

She added, "He's a kid! Leave him alone! And I felt really terrible after saying that, and I felt such guilt."

During the same segment, Osbourne and Kelly revealed a common celebrity crush - Jason Momoa. Osbourne described him as "stunning," indicating their admiration for the actor.

Kelly also mentioned that she has reconciled with everyone she had feuds with in the past, stating that she had either become friends with them or at the very least, "friendly."

"My biggest feud that I think people cared about was me and Christina Aguilera when I was like 16, and we were, like, pitted against each other in the media for so many years that we both thought that we didn't like each other," Kelly said.

"And then we actually sat down together at a Christian Dior fashion show, and ended up really liking each other. It was like a lovely experience," Kelly added.