Kate Middleton's sister Pippa is single again. Well, maybe. If recent reports are to be believed, then it looks like the younger sister of Duchess of Cambridge and her millionaire stockbroker boyfriend Nico Jackson have parted ways after dating for three years.

The latest buzz going wild on the Internet, suggests that Pippa Middleton and boyfriend Nico Jackson have split. The break-up news was revealed in Daily Mail, after a source close to the 32-year-old Middleton daughter confirmed that there was "no third party involved" in the break-up.

"Pippa and Nico have parted ways. No third parties were involved," a close friend of Pippa told the website.

The report clearly stated that Jackson's move to Switzerland from London is the reason behind the split. The couple apparently was finding it hard to spend time together and this placed strain on their relationship.

This news has come as a shock to many, who were speculating that Pippa-Nico would get engaged. Especially, after the couple was spotted getting cozy, recently. Pippa and Jackson were photographed showing PDA while leaving Violet Hill Studios, a healing arts centre that offers workshops in yoga, meditation and healthy cooking, among other areas of interest in London, last month.

The couple's relationship first came to light in 2013, but then, Nico moved to Geneva from London last year to work for a hedge fund. This is when stories about Nico-Pippa split, started doing the rounds.

However, in April the pair sent a clear message out that all is well between them when they took a short vacation in Venice, Italy, and were also spotted having a romantic dinner date in London.

And now, the buzz about the break-up has gone viral again, after pictures of Pippa Middleton spending a lot of time with ex-boyfriend James Matthews have been published by various media houses.

Pippa briefly dated Matthews, a 40-year-old investment banker in 2012, just before Jackson. The recent photos reportedly show the pair entering a house in West London, after Pippa took Matthews's dog for a walk.

And not just James Matthews, Pippa was even pictured on a lunch date with another ex Alex Loudon, in Fulham.

All this put together strongly suggest that Kate Middleton's younger sister Pippa may have split with her boyfriend of three years Nico Jackson. And it seems like the reason is quite understandable.