Back in the day, Mark Wahlberg was famous for his Calvin Klein ads. These days, it’s more about his movies but recently these worlds have merged when photos were taken of him on set in his underwear… and boy does he look good.

Wahlberg was on set filming for a new movie called ‘Pain and Gain‘, and seemingly on a break while chatting on the phone (either that, or it’s actually part of a scene in the film). He stars alongside Ed Harris and Dwayne Johnson (aka The Rock) in a film about a pair of bodybuilders in Florida who get caught up in an extortion ring and a kidnapping scheme that goes terribly wrong.

The film comes out in 2013, but for now check out the 40-year old‘s sexy pictures below.

As a sidenote, I just had a flashback to WinterPride this year in Whistler. We were playing a drinking game where each person had a celebrity on their forehead and you have to try to guess it by asking yes or no questions. Mine was Mark Walberg and you can guess that when I asked, “Would you bottom for this celebrity?,” the response was a resounding “YES!!” LOL.

Man he looks good for forty!

Alongside one of his CK ads – both pics are super hot.