Ruth Jones, the star and creator of Gavin And Stacey, has surprised fans with her dramatic weight loss - shedding four-and-a-half stone.
The former Fat Friends star, 45, reportedly said it had taken 22 months of calorie-counting to drop to a size 16.
She told the Daily Mail: "I came back from holiday a couple of years ago - January 2010, and we all overdo it on holiday, don't we? Something just clicked, I felt this is now or never, I wanted to make a positive change for me, and I haven't looked back."
Ruth, who starred as Nessa in the BBC hit Gavin And Stacey, said: "It's taken me 22 months to lose four-and-a-half stone. Although I have done loads of diets in my time I have never done it the old-fashioned way - taking in less calories than I was using.
"I thought, right, they say 2,000 calories a day is the norm for a woman. I'll aim for 1,200-1,500 a day and see how it goes."
Ruth, who is about to star in Stella, a comedy drama she has written for Sky1, said: "Some days are better than others. But if you think about it, there's calorie values on the back of everything - supermarket sandwiches, chocolate bars - everything."
The actress showed off her new shape at the recent West End preview of One Man, Two Guvnors, starring her friend James Corden.