Mark Wahlberg has undergone an epic transformation for his role in new movie Stu.
The usually ripped actor gained 20lbs rapidly, putting the weight on in just three weeks to play the former a heavyweight boxer in the film.
The 49-year-old was recently seen on the set of the film in Los Angeles, but he was hard to recognise after he packed on extra pounds for the role.
The star, who is usually seen sporting a rippling six pack and bulging muscles, had shaved his head and taken on a much bigger build to play the heavyset former boxer turned priest.
Donning a green polo shirt that hugged his curves, the transformation was quite apparent.
He threw on a patterned sweater later in the day, which covered up his new physique.
Speaking to Jimmy Kimmel on his show last month, Mark opened up about the role saying: "I'm playing a guy who was a fighter - he was many things.
"He was a fighter, he moved to L.A. to become an actor, he fell in love with a girl, he had an accident, he had an outer-body spiritual experience, he decided to become a priest.
"He died of a rare disease, IBM, but he had a big impact on a lot of people in a very short amount of time."
Mark then revealed that he had set himself the goal of gaining 30 pounds in just six weeks.
The film star said: "After we do the boxing scenes, I get to put on as much weight as possible over the course of the film, so I'm challenging myself to put on 30 pounds in the next six weeks."
Although it had been suggested he gain the weight healthily, Mark admitted he just wants to eat everything after spending so long on a rigid food regimen.
He said: "They want me to do it as healthy as possible. I'm like, 'Dude, I've been on such a regimen for so long, I just want to eat everything in sight.'
"I want to go to bakeries, I want to go to Denny's, I want to get pancakes. I want to get everything that I could possibly get my hands on."
