Mark Ruffalo Good Genes Or Good Docs?

7/23/2017 12:00 AM PDT

Mark Ruffalo -- Good Genes or Good Docs?

Mark Ruffalo’s good looks are avenging!

Here’s a 33-year-old version of the ‘stached star in West Hollywood back in 2000 (left) and 17 years later ... the infamous Hulk at an Expo in Anaheim, California last week (right).

Marvel-ous!

The question is ...