By Breaking Celebrity News Staff

Pippa Middleton became the world's most lusted after woman at the royal wedding last week.

Kate's curvaceous sister, however, is already in a serious relationship.

Sorry ‘bout that!

While Pippa won the hearts of millions of men in a figure-hugging Sarah Burton for Alexander McQueen gown, her boyfriend hid in the shadows to avoid stealing even more of newlyweds William and Kate’s spotlight.

Pippa, 27, began dating former cricket player Alex Loudon, 30, a year ago and the gorgeous pair are engaged in all but name, Breaking Celebrity News can report. The dashingly-handsome 6'3" Loudon, now a stock broker, went to school with Prince William at Eton and has since stolen the heart of his pal's smoking hot sister-in-law.

"They have been virtually living together in London, and Pippa is a regular visitor to his family’s stately home," a friend of the couple told the