Since Kate's engagement (or thereabouts) the Duchess of Cambridge has lost a significant amount of weight, dropping from a UK size 10 or 12 (a Canadian equivalent of 6 or 8) to an estimated American size 0 (UK size 4)!
Many people have criticized this significant drop in dress size, especially because Kate was never large to begin with. However, it is said that she has dropped this weight due to the stress of her new role and other major life changes, and, according to other sources, because she started following the Dukan Diet - a diet that manages to shed pounds in quick and constant way (some say it's healthy and others not).
Here is a before and after shot of the Duchess of Cambridge:
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