Prince William Dances to “Shake It Off” at Taylor Swift Concert

Prince William was dancing like nobody was watching at Taylor Swift‘s London concert.

That is, if “nobody” was the some 90,000 fellow fans at London’s Wembley Arena. While watching the singer’s Eras tour show from a VIP box with kids Prince George, 10, and Princess Charlotte, 9, June 21, the Prince of Wales danced to “Shake It Off” and a fan’s video of him showcasing his moves has gone viral.

William, who was celebrating his 42nd birthday, and the children got to meet Taylor in person as well. He and the “Blank Space” singer shared photos of themselves taking selfies backstage, with the Grammy winner including her boyfriend Travis Kelce in her pic, making their relationship Instagram official less than a year after they began dating.

“Happy Bday M8!” she captioned her post. “London shows are off to a splendid start.”

William, who famously performed with Taylor and Jon Bon Jovi at an event in Kensington Palace in 2013, captioned his pic, shared on his and wife Kate Middleton‘s Instagram page, “Thank you @taylorswift for a great evening! #LondonTSTheErastour.”