UK pop sensation Ellie Goulding has been left red-faced after an awkward grilling about her relationship with Prince Harry on Australian TV show, The Project.

Host Carrie Bickmore was quizzing the 29-year-old on whether she was pregnant with the royal's child, in an apparent dig at speculation in gossip magazines, but Goulding's embarrassment made it all a bit uncomfortable.

"Please don't let me go red," she replied, awkwardly looking away from the camera.

Prince Harry and Ellie have been close for years. Photo / Getty Images
Prince Harry and Ellie have been close for years. Photo / Getty Images

"I'm bright red. Why did I have a feeling that was going to come up?" she continued, while dramatically fanning her face.

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Earlier this year, the Prince and pop star reportedly began texting following her split from Doug Poynter from British boy band McFly.

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They were also spotted flirting and kissing at a post-polo party in England in June, with a source claiming at the time: "Harry and Ellie only had eyes for each other all night - they spent a lot of time sitting together under blankets. 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."

The pair has known each other for years - Goulding sang at his 30th birthday two years ago, and also performed in the closing ceremony of the Invictus Games as a favour to him.