Pippa Middleton likes to stay relatively quiet when it comes to her personal life, but it looks like there's more to her than what we see on the surface. In fact, there are hot new rumors that say Kate Middleton's little sister might have been hooking up with Prince Harry all of these years.

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And while some are asking how the supposed couple hid their relationship from the press, others are asking if she was cheating on her then-boyfriend, Nico Jackson, too?

According to OK! Magazine on Wednesday, royal sources say that Pippa and Harry have had a "secret romance" for months now, and that things are getting very hot and heavy between the two.

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But it's still unknown exactly when the couple started dating, as Pippa and Nico just broke things off a few short months ago. Insiders say that things simply didn't work out because Pippa lives full time in London while Nico works as an investment banker in Geneva, Switzerland.

Still, rumors are swirling all around London that Pippa and Harry might be the country's biggest and hottest celebrity couple yet. What's more, the Duchess herself supposedly even caught the two "snogging" (kissing) in a bathroom together.

Do you think Pippa and Prince Harry make a good couple? Let us know your thoughts in the comments section below.