You’re probably all too familiar with how the sun (and gravity) can age your skin over the years. What you may not realize is that there are other changes happening under the surface–fat being gained here and lost there, jawbones shrinking, eye sockets widening–that affect your appearance too. To make sense of this mysterious process known as (gulp!) aging, glo.msn.com compiled before and after photos of some of our all time favorite hollywood beauties. Click on the photos above to view how these six starlets looked up to 54 years ago and how they look today!