Kelly Osbourne and Sid Wilson are expecting their first child

Kelly Osbourne has announced with a post on Instagram that she is expecting her first child. Photo / Getty Images

Kelly Osbourne is expecting her first child.

The former Fashion Police star - and daughter of rock legend Ozzy Osbourne and his wife Sharon - is "ecstatic" to be welcoming her first little one with her boyfriend, Sid Wilson of Slipknot fame.

In an Instagram post of the mother-to-be holding a copy of the sonogram from Thursday, the 37-year television personality wrote: "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!"

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The couple - who have known each other 1999 during Ozzfest, a tour organised by her father Ozzy - were said to be "very happy together", according to a secret source.

Last year, Osbourne shared that her battle with addiction had "robbed" her of much of life's milestones, such as having children.

She said: "I feel very behind. As a woman, I would have loved to be married and have children by now. My brother [Jack] has three daughters and I would have loved to have kids by now, but that wasn't what was in the cards for me yet."

However, the star admitted that she "would have been no kind of mother at all because I was that crazy addict that was like, 'Oh yeah, I'll stop doing drugs when I get pregnant because I have to.' Like, that's insane that I would ever even think that."

In April 2021, after four years sober, Osbourne shared that she had relapsed but was "back on track".

She said: "This is a little hard for me to talk about, but I've always promised you that I will always be honest with you about where I'm at and what's going on in my road to recovery. I relapsed. Not proud of it, but I am back on track."