Kate Middleton Before & After the Royal Wedding

Kate Middleton's 'skinny secret' is out, and it's sweeping the nation! What's her secret? Why it's the Dukan Diet. She is said to have used this diet in order to lose weight for her wedding to Prince William on Friday, April 30, 2011.

While it's obvious that she did indeed lose weight on this diet, she definitely did not need to... fortunately she did not over do it, and looked quite stunning for the royal wedding! Here are a few before & after photos of the royal bride.

(Kate Middleton before)

(Kate Middleton before)

(Kate Middleton after)

(Kate Middleton after / Pippa Middleton)

(Kate Middleton after / Pippa Middleton)

How much weight did Kate Middleton lose on the Dukan Diet? At 5-ft. 10-in., the Princess bride has reportedly gone from a U.K. size 10 (size 6 in the U.S.) to a U.K. size 6 (size 2 in the U.S.).

Pippa Middleton, Kate's sister, also looked amazing at the wedding... the Middleton sisters looked very healthy, happy, and stylish.

(Pippa Middleton)

(Prince William and Kate Middleton - Royal Wedding Photo)

(Kate Middleton after in her second wedding dress)

Kate Middleton is formally known to us now as, Catherine, Duchess of Cambridge... wow, what a beautiful bride she made. :)

Read more about: The Dukan Diet: 2 Steps to Lose the Weight, 2 Steps to Keep It Off Forever...