Less than a week after the royal wedding, the Middletons' party dresses honeymoon is over.

 

Hot on the heels of nude photos circulating online of newlywed Kate's younger brother James, two scandalous pictures of sister Pippa Middleton are making the rounds.

 

In one photo, Pippa is wearing a white skirt wedding gowns and purple bra as she dances with an unidentified man who is only wearing boxers.

 

The second snapshot shows the 27-year-old wearing a supershort strapless dress that was reportedly constructed from rolls of toilet paper.

 

Similar to the first pic, Pippa seems to be in the midst of a party with friends. Bottles of alcohol and playing cards are strewn on a table shown in the foreground.

 

Though it's unclear when the pictures were taken, they are likely to only add to the bridal gown bridal dress sensation surrounding the brunette stunner.

 

Pippa captivated audiences who tuned into the royal wedding last Friday, with some fans going as far as saying she – and her white, body-hugging Alexander McQueen gown – stole the spotlight from her older sister.

 

There's also a newly-launched prom dress cocktail dress website with the address pippsa--.com, a "tribute" site that focuses on her derriere.

 

It's no wonder, then, that Pippa has quickly become one of the U.K.'s hottest bachelorettes, though she may not be that way for long. According to reports, she brought rumored beau Alex Loudon, a cricket-player-turned-businessman, as her date to the wedding.

 

"At heart, Pippa is a party girl and she likes to have fun," a source evening dresses told the Daily Mail recently.

 

And she's not the only one: 23-year-old James' photos, which date back to at least 2008 and show him and his pals in various states of undress, indicate he clearly likes to let loose, too – or used to.

 

"He's grown up a lot since [the photos were taken] and would never behave like this now," an insider told Us Weekly. "He's a good guy. Party days are well behind him."

 

"These photos were not for the public, they were on his private Facebook profile and someone managed to get in and take them," the source added. "He'd rather they weren't out there."