Ben Affleck turns 40 today! We're getting in on the celebration by taking a look back at some of his sexiest pics. Ben's been one of Hollywood's hottest leading men for over a decade, and in addition to playing doting dad to his three kids, he's also a loving husband and accomplished director. His classic good looks make him easy on the eyes and are just one of the reasons he earned the title of Sexiest Man Alive in 2002 and joins best friend Matt Damon in the Handsome Men's Club. Click through to see Ben's hottest moments now — and happy birthday, Ben!