James Martin, 45, revealed how he dropped five stone in weight cutting out a certain fat laden food.
The British chef and television presenter rose to fame presenting BBC cooking show Saturday Kitchen, and last year starred on Strictly Come Dancing.
He currently presents ITV show Saturday Morning with James Martin.
Famous for his pudding and Yorkshire pudding recipes, the 6ft 4 chef, who is married to Louise Davies, dropped from 19st 7lbs to 14st.
So how did James lose all this weight? He stopped eating one of his main cooking ingredients.
The famous chef, who once ate chunks of butter as he was cooking, gave up this bad habit to help him lose the weight.
“I’m determined to stay healthy and fit,” he told Daily Mail.
“It’s hard work because I’m a big bloke so I’ve really got to watch what I eat and drink, and make sure I exercise regularly.”
He also credited his Strictly dancing regime for helping him shift the excess stones – losing five stone in seven weeks.
“I mean, I needed to!” he told Prima magazine, talking of how he dropped the weight during Strictly filming.
Talking after his friend, chef Simon Rimmer, appeared on the show, James explained the gruelling regime.
“Once you get past week four, it’s seven days a week, 10 hours a day minimum.’
Recently, it was revealed how Jamie Oliver lost two stone in three months.
He managed it by changing his habits in the bedroom, namely how much he slept.
The television chef, who rose to fame with BBC show The Naked Chef, tackled his weight issues ahead of his 40th birthday in 2015.
He said at the time he felt time “ticking” ahead of this milestone age.
But how did the chef, who is married to model Jools Oliver, lose all the weight?