The Boogie Nights star was at one point eating 11,000 calories per day in an effort to gain weight to play the part of boxer-turned-priest Father Stuart Long in the forthcoming biopic.
Appearing on The Tonight Show Starring Jimmy Fallon, Wahlberg described the process of weight gain, saying: “Unfortunately, I had to consume, for two weeks, 7,000 calories [per day] and then for another two weeks, 11,000 calories.
Mark Wahlberg has opened up about the extreme diet he adhered to in preparation for his role in the recent film Stu.
In Stu, Wahlberg also plays the character during the height of his boxing career, for which he had to get into extreme shape.