Sharing a post on her Instagram stories, Osbourne - who is the daughter of Sharon and Black Sabbath singer Ozzy Osbourne - said she was "not ready" to share details of her baby.

It comes after former X Factor judge Sharon was asked about her grandchildren and the recent birth during an episode of The Talk, and said that both Kelly and her son were doing "so great".

"She won't let a picture go out of him, and I'm so proud of her," she said. She also revealed the baby's name.

Posting in her Instagram story, apparently in response to her mother's interview, Kelly Osbourne wrote: "I am not ready to share him with the world.

"It is no one's place but mine to share information on my baby."

It is understood Kelly shares the child with boyfriend, 45-year-old Slipknot star Sid Wilson.

She shared news of her pregnancy in March 2022, posting a picture of a scan on Instagram, captioned: "I know that I have been very quiet these past few months so I thought I would share with you all as to why... I am over the moon to announce that I am going to be a Mumma. To say that I am happy does not quite cut it. I am ecstatic!"

Wilson shared a different scan picture in May 2022.

The pair had confirmed their relationship a few months earlier, on Valentine's Day, with Kelly saying: "After 23 years of friendship I can't believe where we have ended up! You are my best friend, my soulmate and I am so deeply in love with you Sidney George Wilson."

Sharon Osbourne also shared her happiness about her daughter's pregnancy when it was announced, writing on Instagram: "My (heart) could not be more full. So excited to share the beautiful journey ahead with you."

Kelly's brother Jack Osbourne also has four children.