Here's a few reasons we love the Olsen twins:
2. Jane and Roxy Ryan from one of our favorite teen movies, New York Minute. These two sure knew how to have a good time -- and we love them for that!
4. Doesn't their sisterly love just make you wish you had a twin?
5. This photo of them as Anna and Elsa from Frozen. Is it perfect or is it perfect?
We're very glad we got to watch these girls grow up to be beautiful ladies. Here's to more years to come. Happy birthday again to Mary Kate and Ashley! NKD loves you!
(By Dana Reandelar)