Kelly Osbourne Reveals She’s Changing Son Sidney’s Last Name After “Biggest Fight” With Sid Wilson

Kelly Osbourne plans to keep the family name going.

The reality star revealed that after a major disagreement with Sid Wilson, the couple plan to change the last name of their 15-month-old son Sidney.

"This is personal, and I didn't expect to ever talk about this, but I'm going to," Kelly told parents Sharon and Ozzy Osbourne on a recent episode of The Osbournes Podcast. "It's the biggest fight me and my baby's father have ever, ever, ever had, and probably ever, ever, will." 

As she explained, "I wanted our son to have both of our last names, and he wouldn't let me. We had a huge fight. I feel that I was forced into doing something I didn't wanna do."

The 39-year-old admitted that while she may not be quite ready to forgive the Slipknot member—who she's dated since early 2022—for that decision, they're working through it.

"Right now, my son doesn't have a double-barreled last name," she explained. "But, after lots of eye-opening conversations and some couples therapy, he has seen the light. We are going to legally change our son's name to have both of our last names."

She added, "We both made our child, so he should have both of our last names."

While she disagrees with the musician's beliefs, she understands why he was so adamant about only their son's last name since "Sid comes from a really traditional English family."

Her parents applauded the couple's recent decision, with Ozzy reflecting, "It's crazy that the person who grew that child inside of them didn't have the same name."

Since welcoming son Sidney in November 2022, Kelly has been open about her parenthood journey.  

"I'm a mom now, I love it. It's the best thing that has ever happened to me," Kelly told E! News in September, adding, "It's scary as f--k because you don't want to make a mistake."

But it's so worth it for her, especially when she's with Sidney. "Now my favorite thing is that he is, like, mom-obsessed, just where, if he sees me, he is reaching for me," she gushed, "and I love it."

Keep reading for more of Kelly's most candid thoughts on motherhood.

"It's scary as f--k because you don't want to make a mistake," Kelly Osbourne told E! News in September about becoming a mom to son Sidney with Slipknot DJ Sid Wilson.

"It's all these little tiny things and these mistakes that you ultimately make because you can't learn unless you make a mistake," she explained. "It's just unfortunate that you have to do it with a baby."

Kelly was diagnosed with gestational diabetes "well into my third trimester," she told People in September 2022, "so it wasn't like I developed it as some people get it from the get-go when they're pregnant. I got it in my third trimester and basically, I thought it was something that I had done wrong."

Her only pregnancy craving had been sugar, especially sweet drinks, Kelly explained, and even though she tried to temper it by drinking fresh-pressed juice, "it still had a lot more sugar than I needed."

Once she made purposeful changes in her diet, she continued, she suffered from a sugar-withdrawal headache for awhile but ultimately lost 10 pounds, stopped having to wear compression socks and her skin cleared up.

"I wish I had this kind of incentive prior because I've never been able to stick to anything a hundred percent the way that I have been doing this because I'm not doing it for myself," Kelly said. "I'm doing it for my baby. But I have learned—I can't even begin to tell you the changes that it's made."

What mom doesn't look at her kid sometimes and marvel, Hey, look what I made?!

"No, I cannot believe I have a baby," Kelly said on TODAY in May, talking to Hoda Kotb and Jenna Bush Hager ahead of her first Mother's Day.

"I have a beautiful little baby boy," she continued, "and he is my reason for living, my reason for getting up in the morning, my whole life revolves around him. And now I understand what the word 'purpose' really means."

"I have a new found respect for working mothers," Kelly wrote on Instagram Feb. 19. "I took my first job since having a baby. Having to leave him this morning was one of the hardest things I have ever done. This day can't go by quick enough for me. I can't want to have him back in my arms."

She solved that problem the next day: "I could not leave him again so it's bring your #BringYourBabyToWorkDay," she posted to Instagram Story.

Just because she can wrangle some alone time, actually wanting it is another story.

"My mum is trying to get me to not be so attached to the baby right now, because I don't do anything unless it has something to do with my baby," Kelly told E!, "and she's like, 'You have to take some time out for you.' But I try and do it, and the next thing I know, I'm sneaking out the back door to go home to be with my baby."

While some celebs host a real bumpfest on social media, flashing bare bellies right up to their due dates, Kelly was admittedly self-conscious about sharing her journey in real time with millions of people (after announcing that she was expecting with the aid of a few sonogram snaps).

"There are no pictures of me pregnant," she replied in August to an Instagram commenter who asked if she'd used a surrogate to deliver Sidney, "because I hid for 9 months because I did not want to get fat shamed."

She also couldn't help comparing herself to the ladies who leaned into their pregnancy silhouettes in public.

"You can wear so many things that weren't considered appropriate before and then Rihanna changed it for everyone," Kelly said on Dax Holt and Adam Glyn's Hollywood Raw podcast. "Also, it made me sad because I didn't get to show off my pregnancy belly because I literally was a f--king moose and it was embarrassing."

Kelly admittedly wanted to get back into fighting shape as soon as possible after Sidney was born.

"I'm going to be honest," she told E! in September, "I felt the pressure of, after having the baby, to lose the baby weight. It became my mission. I was obsessed with it because I didn't even want to get brought into the conversation, I just wanted to be left alone."

Getting it done was "miserable," albeit worth it for her in the end. "I was hungry all the time," she shared, "but I'm really happy with the results."

However, at one point she decided she was overdoing it.

"I was like, 'Well, I lost all the baby weight. Let's see how far I can go with it,'" she told Scheana Shay on the Sept. 8 episode of her Scheananigans podcast, "and then went a little too far."

Having been candid in the past about setbacks in her recovery, Kelly marked a year of sobriety on May 27, 2022, a few weeks after announcing she was pregnant.

"What a difference a year can make!" she wrote on Instagram. "If you would have told me 365 days ago that I would be sober, happy, and about to be a mumma I would have laughed in your face. Life is truly amazing when you do the work. Thank you to everyone that has supported me on this journey. I love you all so much!!!!!!!""

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