Mark Wahlberg Is JACKED!

3/30/2012 4:00 PM PDT

He's always been known for having ripped muscles, but 40-year-old Mark Wahlberg proved he's bigger, buffer and beefier than ever by going shirtless on the set of his new flick in Miami on Friday.

Marky Mark may have lost the Funky Bunch a long time ago, but not the yoked bod.