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OTRC: Pippa Middleton split from on-and-off boyfriend Alex Loudon, report says

Pippa Middleton, sister of Kate, Duchess of Cambridge is seen in the audience at the Queen's Grass Court Championship in London, Thursday, June 9, 2011. (Kirsty Wigglesworth)

Pippa Middleton has broken up with former England cricketer Alex Loudon, according to several reports.

The pair has not been spotted together for several weeks and according to the Daily Mail, Middleton and Loudon had a "blazing and very public" argument at a wedding in September.

A source close to the Duchess of Cambridge's little sister told the newspaper that the two are "barely speaking" after Middleton, 28, walked out on the 31-year-old financier.

"Pippa had been on the dance floor without Alex all night and he didn't appear happy. They could clearly be heard arguing hammer and tongs," the source told the Daily Mail.

The British newspaper reports that Loudon was also overwhelmed with his girlfriend's sudden and unexpected fame following the Royal Wedding.

People magazine reported that the couple had split in June, but the break up was later denied.

If things indeed didn't work out, Middleton has plenty of admirers. Pippa's appearance at the Royal wedding in a gorgeous Alexander McQueen gown sparked interest and earned her the unofficial title of "Her Royal Hotness" and a website and Facebook fan page dedicated to her derriere.

Justin Timberlake recently expressed interest in Middleton, telling Esquire UK that, "Us American males are big fans of Pippa."

Timberlake isn't the only American to praise Kate's younger sister, who goes by P.Middy in the British tabloids. According to E! News, Usher also voiced his approval, telling Look magazine that he wanted Pippa to model for his lingerie line.

Middleton's sister Catherine, Duchess of Cambridge and brother-in-law Prince William recently visited a United Nations aid depot in Copenhagen, Denmark. Kate sparked pregnancy rumors after turning down peanut paste.

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