The reigning X Factor champ says that Prince Charles outed himself as a secret fan of the ITV series when the pair met at a performance at London Palladium.
Matt says Prince Charles praised The X Factor winner's cover of Prince's Purple Rain from last year's live shows.
Matt told The Sun newspaper: “It was weird. Do you think the royals sit at home watching The X Factor with a bit of popcorn?”
It was Matt who won The X Factor last year and will release his debut album in the autumn.
Last month saw Matt put out his first song with none other than Enrique Iglesias.
Matt teamed up with Enrique as well as rapper Sean Paul on a new version of Enrique's hit Subeme La Radio (Turn Up The Radio).
The song was released to download last month and Matt - who grew up in Spain - was over the moon with the collaboration.
"Enrique asked me to be part of this track, which is amazing," he said. “We’re label mates and both signed to RCA but mainly it’s because I have a Spanish background.
“I sing the second verse and the second chorus. We did it out in Miami. They said, ‘Enrique wants you’."
Matt added: “I used to sing his songs as a kid in my room in English and Spanish. I’ve been working out a lot. I’m prepping myself for a sexy Spanish music video.
“Forget Simon Cowell’s unbuttoned shirts — I’m taking all the buttons off!”