Kelly Osbourne is looking like a whole new woman these days since losing weight, and her fans can’t get over one of her latest Instagram posts.
The television personality recently shared several photos of herself in a stunning black gown for the Serpentine Summer Party in London. Although her dress received a lot of positive attention, most internet users in her comments section couldn’t help but point out her drastic body transformation, which she credited to weight loss surgery and more. Read about her party look and new figure below.

Kelly Osbourne Wears A Strapless Black Gown To A Party In London
Last week, the former reality star stepped out for the 2025 Serpentine Summer Party, an A-list event that takes place in the Kensington Gardens in London, England. Many significant stars from the U.K. attended, and Kelly was one of them.
For the star-studded evening, she wore a long, elegant strapless gown from the fashion brand Rebecca Vallance and posed alongside the creative director, Rebecca herself. The gown was made from a silky black material and included a gold metallic border at the top.
Kelly wore her long platinum blonde hair down and accessorized the simple yet stunning gown with a simple gold necklace and strappy black heels. The dress cinched at her waist, showing off her slim figure, which she's been working on over the years.

Fans React To Kelly's Party Look And Weight Loss
The 40-year-old's look for the luxurious evening allowed her to flaunt her extra small physique, which has changed a lot as she's been working on her health and weight loss journey. When she first became famous due to her rockstar father, she struggled with her weight, which subsequently led to her looking to improve her health and shed some excess pounds.
In addition to working hard on her mental health and giving up drinking, she revealed years ago on the Hollywood Raw podcast that she had gastric sleeve surgery, which was a big spark that helped her change her lifestyle habits.
"I did it, I'm proud of it," she said.
"All it does is change the shape of your stomach. I got that almost two years ago. I will never ever ever lie about it ever. It is the best thing I have ever done."
Kelly has also been very adamant about working extremely hard to stay healthy alongside her surgery, and her fans have certainly taken notice. Under her Instagram posts for the London party, users wrote that she looked "unrecognizable."
"Wow," wrote an Instagram user.
"Stunning," added another.
"Oh, so beautiful," commented a fan.
The mom-of-one seems to be doing better than ever, and it looks like her fans are hoping she'll be able to stay happy and healthy.

