Ben Affleck Good Genes or Good Docs?

The only thing hotter than Ben Affleck's career right now is ... Ben Affleck.

Here's the 25-year-old Oscar winner back in 1997 (left) -- and 15 years later, the 40-year-old "Argo" director/star at the film's London premiere this week (right).

Just like "Gigli," Ben is da bomb.

More Good Genes or Good Docs?