Chelsy Davy, the Zimbabwe-born blonde beauty with a passion for partying and a penchant for short skirts, has been dating the third in line to the British throne, 23-year old twinkly-eyed, PR disaster-prone Prince Harry, for four years now.

So we were a bit surprised to find that she still hasn't met his grandmother, aka: the Queen.

This weekend, all that will change as the potential future princess will be meeting the Queen at the wedding of Peter Phillips (Princess Anne's son -- she didn't want them to have titles) to Canadian Autumn Kelly.

According to the Daily Mail, Chelsy is "re-branding" herself in honor of the big day. They report that Kate Middleton, William's girlfriend (who will not be attending the wedding as she'll be on vacation with her prince) has been giving Chelsy style advice as she tries to become a bit more Diana and a bit less Sarah Ferguson before Weight Watchers (loud, with tacky clothing).

But maybe Chelsy's image change is less to please the Royal circle than just because she is growing up: the 22-year old is now studying for a graduate degree in law and politics and has apparently put her party days behind her.