It seems as though Hollywood celebrities have found the fountain of youth. A collection of your favorite stars are celebrating their 40th birthday this year,but you would find that extremely tough to believe whether you just took one look at them. Celebrities like Blake Shelton, Alicia Silverstone, or Diane Kruger are all ringing in the stout 4-0,along with - gasp! - Ryan Reynolds, Benedict Cumberbatch, and Naomie Harris. Also in the mix is America's sweetheart,Reese Witherspoon, who already celebrated her special day with a star-studded bash over the weekend. Keep reading to see all the stars who have already turned or will soon be 40 this year. Some of these may shock you!
Source: popsugar.com