"I'm bragging because I worked so hard and it feel good!"
Osbourne has been sharing her new look in photos on her verified Instagram account.
Kelly shared a selfie to Instagram that had fans saying she looked unrecognisable.
Osbourne opened up to ET about her family's health in March.
Replying to Olivia TuTram Mai, the mother of media personality Jeannie Mai, she revealed her weight-loss journey has seen her shed 85lbs (38kg), Fox News reports.
"You look like a different person with your weight loss much more confident... lovely!" one fan commented. Can you believe it?
"Osbourne published a pic that week of her sporting a Gucci zip upward onesie, a complete face of ideal constitute and with new purple hair dragged into a braided bun along with her bangs at a Betty Page-style swoop using a caption that read" Now I am sensing #Gucci".
"I have come to the realization that I constantly put the needs of others before my own", added Osbourne, who celebrated two years of sobriety last year, before noting that 2020 is "going to be the year of me!"
It revealed a size 26 clothing tag, which is approximately a size 2 in the U.S.
The former reality star has been vocal about her struggles with her weight and confessed that she used to be an "emotional eater". "When I get upset, my diet goes out the window".
The British actress also shared that her mom served as her biggest inspiration, as she was very supportive to achieve her weight goal. "It's like you'll have a good day, then a good day and then a really bad day", he said.
Kelly also carried her smartphone on a purse strap, worn cross-body style as many celebs have been doing.
She explained: "Once I learned how to work out right and eat right, it's one of those things that you just have to commit to a life change rather than being on a diet".