"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," a website 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.