The Wall Street star, who turned 70 in September (14), overhauled his eating habits for 2015 and he admits the change has done wonders for his waistline and his energy levels.

He says, "I did a New Year's resolution on gluten, you know, I went gluten-free. I basically took out carbs, bread and pasta... I dropped about eight pounds, got a little energy."

And Douglas, who battled tongue cancer in 2010, insists he's loving the benefits of the new diet, quipping, "Seventy is the new 50! Maybe 55!"