The Chase's Mark Labbett has shared one secret to his incredible 10 stone weight loss.
In 2003, Mark tipped the scales at 29 stone.
But after being on the verge of needing blood pressure tablets, he decided to change his lifestyle.
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Mark, 56, has since lost an astonishing ten stone and earlier this year, he announced he was on his way to wearing XL trousers.
Last week, the former teacher shared one secret behind his dramatic weight loss.
Speaking on ITV's The Pet Show, he explained how his dog Baloo has encouraged him to exercise.
He said: "My wife promised me that when we first got him she would take care of everything - feeding him, walking him and so on.
"That lasted about two weeks before she decided 'Actually Mark, look at your belly - you need the exercise!'"
"I was walking him around the fields, taking me places... I think he's helped a lot, simply because I'm doing more activity."
In November, fans complimented Mark on his impressive weight loss as he posed in a smart suit.
Wearing a black suit, white shirt, and red tie, Mark said: "Off to the ITV Palooza in my shiny new jacket. I scrub up well :) thanks to @vtrilling for being a great wardrobe mistress."
Fans were quick to congratulate and compliment the star.
Chaarnii_ said: "Omg I almost didn't recognise you. Done so well"
Darcyayoung wrote: "Looking good Mark"
And Joanneturner9 said: "Mark you're disappearing in front of our eyes!
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