Kelly Osbourne looks almost unrecognisable after shedding an incredible four stone thanks to regular exercise and a vegan diet.

The 33-year-old reality star has completely transformed her image over the past few years.

She shot to fame back in 2002 after appearing in the MTV reality show The Osbournes alongside her famous family, made up of dad Ozzy, mum Sharon and brother Jack.

Kelly looks worlds away from the gobby teenager who appeared on our screens, often bickering with her younger sibling.

The star, who is currently sporting lilac hair, has transformed her famous figure and her fans are loving it.

Kelly Osbourne has been described as "unrecognisable" by her fans as her weight loss journey continues

Taking to Instagram on Tuesday, the media personality showed her followers how far she has come in her weight loss journey.

One fan described Kelly as "unrecognisable" in her most recent social media upload.

She displayed her killer cheekbones and chiselled face as she plastered a juicy pout across her face while travelling in the back seat of a car.

The Papa Don't Preach hitmaker showcased a slimmer frame in the striking selfie.

The TV star has lost a whooping four stone by eating a vegan diet and taking regular exercise

Unsurprisingly, Kelly's Instagram grid update caught the attention of her of followers who rushed to leave a supportive message in the comment section.

One fan gushed: "You look like a different person with your weight loss much more confident... beautiful."

Another added: "Gorgeous."

While a third gushed: "Stunning picture."

A fourth said: "Oh my gosh, you lost a lot of weight."

Kelly shot to fame on MTV show The Osbournes alongside her famous family

Kelly's weight loss transformation began when she signed up for the US reality show, Dancing with the Stars, in 2009.

Following her stint on hit reality dance show, she lost a whopping 30lbs due to the gruelling rehearsals and sixteen-hour days.

Despite shedding the pounds while taking part in the dancing show, she saw her weight fluctuate after the show finished.

In an effort to maintain her weight loss once and for all, Ozzy and Sharon's daughter took up hiking a few times a week in the Hollywood Hills.

Kelly often wows her fans with her social media snaps

This resulted in her dropping a further 30lbs in just a matter of a few months.

Speaking to HuffPost, Kelly opened up about her weight loss journey when she revealed mindful nutrition had changed her entire life.

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."

In 2012, Kelly revealed her continued weight loss was down to her relationship with vegan chef Matthew Mosshart who encouraged her to follow a plant-based diet.

She often gives fans an insight into her diet on her social media accounts.