Los Angeles, Jan 21 (IANS): While filming "The Monuments Men", actor-director George Clooney, played a prank on Matt Damon, making the latter feel that he was gaining weight.

Clooney, who is known for his pranks on the set, instructed the film's wardrobe department to reduce the waist size of Damon's pants by half an inch. This left Damon puzzled as he was trying to lose weight.

"He took in my wardrobe by an eighth of an inch, every other day. (He) had the wardrobe department do that because he knew that I was trying to lose weight," people.com quoted Damon as saying.

Damon used to visit his family in New York and every time he would return, his clothes would be tighter.

"This was a job where I would go back to New York, where I was living with my family, and I would come back (to film in Europe) for two weeks and then I'd go back to New York, and every time I came back my pants were tighter, and I was like, 'Ugh, this is weird. I've been going to the gym," he added.