Kelly Osbourne's Hottest and Boldest Looks Through the Years: Photos

Kelly Osbourne was serving bold looks long before her weight-loss transformation.

Her transformation journey began after she underwent gastric sleeve surgery in 2018, which helped her lose 85 pounds. She has also turned to non-surgical treatments since giving birth to her son, Sid, in 2022, while the death of her father, Ozzy Osbourne, later took an emotional toll that she said contributed to further weight loss.

"To the people who keep thinking they're being funny and mean by writing comments like 'Are you ill,' or 'Get off Ozempic, you don't look right.' My dad just died, and I'm doing the best that I can, and the only thing I have to live for right now is my family," she responded to the trolls. "So to all those people, 'f--- off.'"

Kelly's transformation has drawn plenty of attention, including ongoing speculation about whether Ozempic played a role. Scroll down to see some of her boldest looks through the years as her evolving appearance continued to make headlines.

In an August 17 photoset, Kelly showcased her slimmed-down figure in a fierce cheetah-print swimsuit that matched her gold necklaces and diamond earrings. She completed the look with black sunglasses.

She added a lengthy caption in which she shared she was "learning how important it is to step away from the madness sometimes."

"I get so wrapped up in life, work, people, plans… everything going on around me, that I genuinely forget I'm allowed to stop. To switch off. To breathe. To just be," she wrote.

Kelly said the holiday reminded her that "taking a break isn't wasting time" and left her feeling "reborn" and "lighter, calmer, happier." She then expressed she was "very much NOT ready to go home."

"Note to self: do this more often. Life will still be there when you get back. ✨," she concluded the post.

The "One Word" songstress basked in the sun aboard a luxury yacht in a white one-piece swimsuit, accessorized with a wide-brimmed straw hat, cat-eye sunglasses and layered gold necklaces.

"Serving sea, sun, and zero apologies. ☀️🌊," she captioned the July upload.

Kelly set pulses racing in a plunging black velvet gown with a daring thigh-high slit that showcased her petite frame. She paired the gown with a structured updo, completing the Old Hollywood-inspired look.

In May 2017, Kelly made her pool day extra hot by lounging on her stomach by the pool, displaying her plump silhouette in a strappy black bikini set.

"#RomancingTheStone can you tell I have a vitamin D deficiency? 🌞," she wrote.

Wearing a strapless black maxi dress, Kelly stretched out across the deck of a luxury yacht and put her sleek figure on full display while soaking up the sun.

She captioned the post, "#SundayFunDay on a ⛵️⚓️."

"To pale for camera so @jodyoli get to break out the tempo tanner! @gottalentau," she shared in a November 2015 update, which showed her donning a black sports bra and matching high-waisted bottoms.

Kelly opted for a sporty, curve-hugging look that featured a purple bra and matching shorts, posing with her back to the camera and both arms raised as she accentuated her backside.