Co-star Josh Duhamel warned us that Wahlberg has an intense schedule that starts with a 3:30 a.m. workout, and Wahlberg explained the need for his rigorous regimen.
"I put on a lot of weight," Wahlberg said. "[Director] Michael [Bay] saw me and freaked out. I promised him I'd get in good shape, so I started training early. I get it all in and then I come to work for 12 hours."
Despite the early workouts and long work days, life on the road has come with some perks for the Oscar-nominated actor. The trip to Europe has afforded the father of four the chance to spend some quality time with his family.