Lou Ferrigno Good Genes or Good Docs?

8/18/2013 12:42 AM PDT BY TMZ STAFF
0718_lou_ferrigno_hulk_genesLou Ferrigno's good looks are incredible!

Here's the then 29-year-old "Incredible Hulk" actor in a promo photo back in 1980 (left) -- and 33 years later the now 61-year-old muscle man at a convention earlier this year (right).

We gotta ask...