Taylor Swift, Travis Kelce snap selfie with Prince William backstage at London Eras Tour show

Taylor Swift helped ring in Prince William’s birthday on Friday when she and boyfriend Travis Kelce posed for photos with the royal and his kids.

The “Fortnight” singer shared the adorable pic Saturday morning, showing herself and the Kansas City Chiefs tight end smiling on either side of birthday boy William, Prince George, 10, and Princess Charlotte, 9.

“Happy Bday M8! London shows are off to a splendid start,” Swift captioned the sweet snap, adding emojis of the U.K. flag, U.S. flag, and shaking hands.

The Prince and Princess of Wales’ official Instagram account also shared another angle of the group photo — minus the Super Bowl champ — captioned: “Thank you Taylor Swift for a great evening! #LondonTSTheErasTour.”

William celebrated his 42nd birthday at the Eras Tour — the first of three London performances — with his two eldest kids, according to royal reporter Roya Nikkhah. She later said he showed off his “dad dancing” during the show.

Video shared on social media even gave fans a look at William’s dance moves as he boogied to “Shake It Off” in a private box.

The tune may be a favorite of the prince. Earlier on Friday, the King's Guard at Buckingham Palace played an instrumental rendition of “Shake It Off,” just hours before the 34-year-old pop star was set to take the stage.

This wasn’t the first time Swift has crossed paths with Prince William. The two previously sang “Livin’ On a Prayer” with Jon Bon Jovi at a 2013 charity event at Kensington Palace.