Prince William reportedly attends Taylor Swift’s Eras Tour concert in London with George, Charlotte, Louis

Prince William celebrated his 42nd birthday Friday evening at Taylor Swift’s first Eras Tour concert in London with his three children — George, 10, Charlotte, 9, and Louis, 6 — according to royal reporter Roya Nikkhah.

Kate Middleton, who announced she was undergoing “preventative chemotherapy” for cancer in March, was not reported to be present at the show.

Page Six reached out to reps for Swift and the Prince of Wales to confirm his attendance but did not immediately receive a response.

While photo evidence has yet to be revealed, it would be no surprise if William took the trip to Wembley Stadium to ring in his new year of life with his kids.

He previously got up on stage with the “Cruel Summer” hitmaker, 34, and Bon Jovi, 62, at the Centrepoint Gala charity dinner at Kensington Palace in London in November 2013 and sang “Living on a Prayer.”

He later admitted to “cringing” at the moment on Apple Fitness+’s “Time to Walk” podcast in 2021.

“To this day, I still do not know what came over me … But, frankly, if Taylor Swift looks you in the eye, touches your arm, and says, ‘Come with me…’ I got up like a puppy and went, ‘Yeah, okay, that seems like a great idea. I’ll follow you,’” he recalled.

“I walked up on stage in a trance, and then sort of halfway through Jon Bon Jovi’s ‘Livin’ on a Prayer’ song, I wake up, and I’m thinking to myself, ‘Am I standing on the stage singing…when I don’t even know the words?’”

Swift’s concert Friday evening not only marked the first show in England’s capital for her record-breaking tour, but the first show she’s played in the city since her breakup from British actor Joe Alwyn. The split is thought to have inspired her “TTPD” song, “So Long, London.”

In addition to performing for royalty, Swift’s return to London was made special with the support of her beau, Travis Kelce, his brother, Jason, and Jason’s wife, Kylie.

They all got into the Swiftie spirit by trading friendship bracelets, with Jason compiling an entire forearm full thanks to her dedicated fans.

Travis, 34, and Swift’s dad, Scott, were also spotted greeting each other with a friendly handshake on the floor or Wembley Stadium ahead of the concert.

“Bridgerton” star Nicola Coughlan was also photographed trading friendship bracelets at Swift’s show.