Kelly Osbourne weight loss has been in the spotlight for years. She has lost around 85 lbs since 2018. The change came from gastric sleeve surgery combined with lasting diet and lifestyle changes, not a quick fix. She has always credited her mindset first, saying the physical results followed once she’d worked on her mental health.
How Much Weight Has Kelly Osbourne Lost?
Kelly Osbourne has lost approximately 85 lbs since having gastric sleeve surgery in 2018. She has been open that surgery alone wasn’t the answer. In her words, it only “helps you along in the process” — the lasting change came from rebuilding her relationship with food and consistently sticking to new habits.
What Motivated Her Weight Loss?
Kelly has spoken about facing pressure over her appearance from early in her career, including being told as a teenager that she needed to lose weight to succeed on screen. During her pregnancy with son Sidney in 2022, she developed gestational diabetes. That diagnosis, and the risk of developing type 2 diabetes afterward, became a major motivator to lose the weight she’d gained.
Kelly Osbourne’s Diet and Exercise
Kelly has described using intermittent fasting, typically eating within an 8-hour window each day. She has also spoken about following a largely plant-based diet, cutting out meat, dairy and processed food for long stretches. On the exercise side, she has mentioned strength training two to three times a week alongside regular cardio, guided by a personal trainer.
She has been clear that therapy and quitting alcohol played as big a role as diet. “I had to fix my head before I could fix my body,” she has said. That mental-health-first approach is a theme she returns to often when discussing her transformation.
Did Kelly Osbourne Use Ozempic?
No. Kelly has repeatedly and directly denied using Ozempic or any other weight loss injection. Speaking to Extra TV, she said: “I know everybody thinks I took Ozempic. I did not take Ozempic. I don’t know where that came from.” She has said her mother, Sharon Osbourne, used the medication, which she believes contributed to the confusion.
Responding to Criticism
Following her father Ozzy Osbourne’s death in 2025, Kelly’s appearance drew comments online, with some users questioning her health. She addressed the criticism directly, explaining she’d been struggling to eat properly while grieving and asking people to be more considerate. Her mother Sharon publicly defended her at the time, noting the timing of the loss.
What We Can Learn From Kelly Osbourne’s Journey
- Surgery supported her results, but it didn’t replace the need for lasting diet and lifestyle change.
- She treated mental health as the starting point, not an afterthought.
- A specific health risk — gestational diabetes — gave her a concrete reason to change, similar to other public weight loss stories.
- She’s been willing to publicly correct assumptions about her methods, including the Ozempic speculation.
FAQs About Kelly Osbourne’s Weight Loss
How much weight has Kelly Osbourne lost?
Around 85 lbs, primarily following gastric sleeve surgery in 2018, combined with diet and lifestyle changes.
Did Kelly Osbourne have surgery to lose weight?
Yes, she had gastric sleeve surgery in 2018. She has said the surgery supported, but didn’t replace, the need for diet and lifestyle changes.
Is Kelly Osbourne on Ozempic?
No. She has publicly and repeatedly denied using Ozempic, saying the confusion may stem from her mother Sharon’s use of the medication.
What diet does Kelly Osbourne follow?
She has described intermittent fasting and a largely plant-based diet, alongside strength training and regular cardio.
