Pratt is, however, good at sticking to a healthy diet and exercise routine. In an exclusive interview with ET, he revealed how he prepared for his sexy shirtless scenes
in GOTG 2
. "It's always good to know the day that you're going to be shirtless because you can really plan to try and peak on that day, you know what I mean?" he explained. "I have a whole routine that I took from this guy who is, like, a bodybuilder guy, you know, like a guy who does competitions. And I also was a wrestler back in the day, where I would learn how to dehydrate myself to cut weight, but ... that was to create a low body weight, it wasn't to create an aesthetic. So, I have a routine that takes about a week and it involves dehydration coming off of carbohydrates."