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New couple alert?

Prince Harry and singer Ellie Goulding have been spotted in close proximity at various public events for years. But the pair's late May hang at the Audi Polo Challenge in Coworth Park Berkshire, outside London, has the British rumor mill buzzing, big-time.

A source close to Harry reportedly told The Sun the prince has been yapping to his pals about "how much he likes Ellie." The tab's insider added that the two became friends after the 29-year-old pop star sang at Prince William and Duchess Kate's wedding reception but had been "in touch" more recently, prior to the May 28 polo match, which she attended along with other stars including Tom Hardy.

Both Harry and Prince William played in the match, which was reportedly followed by a late-night, apparently booze-soaked party.

Though there were no photos allowed at the bash, a few British tabs published pics of Ellie and Harry sharing a hug while smiling for cameras off the field. The Sun, whose report claims Harry is "secretly courting" Ellie, says the pair's get-together was more intense -- a claim publications like the Daily Mail and the Mirror are running with (though reps for neither Harry nor Ellie responded to a June 7 request for comment).

"Harry and Ellie only had eyes for each other all night -- they spent a lot of time sitting together under blankets," said The Sun's snitch. "They were seen having a kiss before Harry had to go because he was playing polo the next day. Ellie left about five minutes later. … Harry was overheard on the way out telling some friends how much he liked her."

As far as the public knows, Harry's been single since he broke up with Cressida Bonas in 2014, although there were whisperings of a New Year's hook-up with a young American woman.

Prior to that, he'd been seen out with "Dr. Who" star Jenna Coleman and was rumored to have nearly gotten back together with his ex, Chelsy Davy.

As for Ellie?

The Sun's source says "she is clearly taken by him, but cautions that "... there's already a lot of talk amongst friends that the palace wouldn't allow her as a serious girlfriend because of her celebrity background."

We have some caution of our own to offer: In recent years, The Sun has been sued by the likes of Cameron Diaz, Russell Brand and Beyonce's dad for publishing juicy gossip they apparently invented. So maybe hold off on ordering any royal-slash-pop star appropriate wedding gifts for now.