Annette Bening: Good Genes or Good Docs?!

Annette Bening is an "American Beauty."

Here's a 33-year-old version of the "Bugsy" babe at an awards show in Los Angeles back in 1991 (left) and 24 years later ... the Warren Betty arm candy and mother of four -- who celebrated her 57th birthday earlier this week -- at a fancy pants party in Hollywood last month (right).