It looks like royal sister-in-law Pippa Middleton, 28, might be on-again with her sometimes boyfriend, Alex Loudon, the cricket player / financial analyst who started dating "P-Middy," as the Brits affectionately call her, in late 2010, a few months before she became the center of a nation's attention when she stole the show at sister Kate Middleton's wedding to Prince William.

Middleton and Loudon have not been publically seen together for quite some time, reports the U.K.'s Daily Mail, and the fact that Pippa is frequently photographed with other male friends, like George Percy, keeps people guessing about the true romantic status of Pippa and Loudon.

However, a British tabloid called The People recently published a story entitled, "It's Back On!" showing Middleton leaving Loudon's home, loading bags into a car. Loudon left about an hour later, reports USA Today. "P-Middy is off the market," the Daily Beast reported, also confirming the relationship.

Middleton is in the process of penning a party-planning book, Celebrate, for which she received a $620K advance from Penguin Books. Celebrate is expected to hit bookstores in autumn of 2012.

For more on Pippa Middleton and Alex Loudon:

Pippa Middleton Skis For Charity

Pippa Middleton Scores $620K On Party Planning Book

Pippa Middleton And Prince Harry Romance Rumors Intensify

Who Is Pippa Middleton's Boyfriend, Alex Loudon?

Pippa Middleton Vacations In Spain Without Alex Loudon

A Newly Single Pippa Steps Out

Pippa Middleton Sparkles In London

Pippa Middleton In Running To Be The New Face Of The Ten-Pound Note?

Pippa Middleton Breaks Up With Alex Loudon

Pippa Middleton Gets Her Own Show On TLC

Pippa Middleton Wows At William And Kate's Reception

Read more about: