James Martin, 46, is a famous chef and television presenter, appearing on countless cookery shows and presenting BBC’s Saturday Kitchen.
The chef is currently starring in his latest series, James Martin’s American Adventure, a show which sees him travel around the US exploring its food scene.
Before going on the hit show, James lost an impressive six stone, even claiming to lose one stone in one week.
Working around food and with a job that entails trialling and tasting many calorie-laden creations, how did James shed the weight?
Earlier this year, James revealed the reasons behind his recent weight loss, telling crowds at Chelsea Flower Show he felt “self-conscious”.
James revealed he knew it was time to slim down after he noticed himself on TV, explaining he became self-conscious after noticing “a bit of a chin” on camera.
He blamed his dip in confidence on the nation having a bigger TV screen and explained how he lost weight by making changes to his lifestyle.
James’ weight-loss journey began on the set of Strictly Come Dancing when he was put on a controlled diet and began to train for the show six days a week.
The chef lost one stone in just one week, telling Prima magazine, “I mean, I needed to!”
Details of the intense training were also spilled by James, revealing that past week four of the show, training is seven days a week for 10 hours a day.
Following his stint on Strictly, James continued on his weight-loss journey, making some drastic changes to his diet.
The American Adventure star is known for his calorie-laden dishes and comfort food, once weighing in at 19 st 7lb.
He admitted to gorging on his dishes, and even eating whole chunks of pure butter that he would use to cook with, with Yorkshire puddings being one of his favourites.
He also once admitted on an episode of Saturday Kitchen that he ate Rice Krispies with double cream and caster sugar for breakfast.
The 46-year-old has since cut all that out, quickly seeing health benefits and losing even more weight.
Talking to the Mail Online, James admitted: “I feel more focused, alert and confident, and my skin’s much better.
“People say they think I’ve actually got taller, which is ridiculous of course, but I suppose it reflects the fact that I do feel more comfortable in myself.”
Another British celebrity chef that has impressed the public with his weight-loss is Tom Kerridge.
He is known for his world-class restaurants, pubs and appearances on UK television, but was also once known for being overweight.
The chef once weighed in at a staggering 30 stone, realising at the age of 40 that he was unhappy with his weight, and deciding to turn his life around.