Los Angeles - Mark Wahlberg's lips "turned blue" after he lost 27kg for his role in The Gambler.
The 43-year-old actor gambled with his health after he dramatically lost 27kg for his role as Jim Bennett, a high-stakes gambler who has a run in with a gangster loan shark.
Talking about his decision to lose the weight, Mark said: "I went from 89kg to - the lightest I'd ever been in a movie was in Boogie Nights, I was 63kg - so I wanted to beat that.
"I beat it by a pound, so 62kg. I was losing weight while we were shooting the movie too, so continuity kind of went out of the window.
"I had no energy, no nutrition, and the studio, there was a complaint about that, that my lips were always looking blue.
"What the fuck do you want me to do? I haven't eaten anything! If you make them red, I'm going to look weird, like I've got lipstick on, so it is what it is."
When asked how he managed such a dramatic loss, Mark told US magazine: "Once I get into it I can't stop, so it's a 24 hour, seven days a week thing.
"I stopped eating food for the first six weeks and just had small liquids throughout the day, then I was exercising two or three times a day."
However, the newly slimmed down actor revealed that his wife Rhea Dunham, 36, and their four children - Ella, 11, Michael, eight, Brendan, six and four-year-old Grace – were not too happy with his transformation.
He shared: "They didn't like it. My wife was a little freaked out, I was losing so much weight. I'm training now for this other thing and my daughter's like, 'You should quit your job, you should become a body builder.' She's just being sarcastic. She's probably heard her mother say something."
Watch the trailer here: