Charlotte Casiraghi looks every bit the royal she is in the September issue of Paris Vogue shot by Mario Testino. Who is she? She is the granddaughter of the beautiful Grace Kelly and Prince Rainier of Monaco and is, therefore, fourth in line to the throne of Monaco. Not only does she model for Vogue, amongst others, she has an established equestrian career and is a published writer and editor. Want to swap lives with her? YES!