Cameron Diaz, Gwyneth Paltrow, Ben Affleck and more! See the seemingly ageless A-listers celebrating 40th birthdays this year
Ben Affleck (August 15)
"It was not fun for me," the Argo director (seen here in January 1998) told The Hollywood Reporter about celebrating his 40th. "It's this moment of bifurcation between youth and middle age. One wants to think of oneself as young. One does not want to think: 'Wait a minute! How can I be halfway to death?'"
Credit: Derek Storm/FilmMagic, Jon Kopaloff/FilmMagic