John Stamos: Good Genes or Good Docs?

4/29/2009 12:00 PM PDT BY TMZ STAFF
John Stamos played the Olsen Twins' uncle on "Full House," but now he's the one still with the baby face.


Here's 21-year-old Johnny back in 1984 (left) -- and 25 years later, the 45-year-old version at an event in February (right).

He really is a Greek god.