Believe it or not, little Kelly Bundy – better known as the lovely Christina Applegate -- turns 40 on Friday!
The gorgeous mother of one, who is now starring on the NBC hit comedy “Up All Night,” isn't the only celeb who surprisingly hit the big 4-0 this year. Mark Wahlberg, Winona Ryder and Jon Hamm are all living proof that age is just a number -- and that 40 is definitely the new 30!
Click “Launch Gallery” below to browse pics of some of your favorite stars who are still looking mighty fine at 40. All of the photos were taken this year!