Swift and Bon Jovi were in London for the Winter White Gala, benefitting homeless youth, and Swift was excited to meet Prince William.
"He was very funny," she said after a conversation with the prince, according to the Daily Mail. "I was really happy he was funny."
William even made a joke about topics Swift is very fond of: boys and breakups.
Swift also performed one of her own songs, "Love Story," which she said she wrote after not be allowed to go on a date with a boy when she was 17.
"This has reference to palaces, princes and princesses and it is very strange that I end up playing it in a palace," she said. "It is my first time playing at Kensington Palace or any other palace for that matter. I have to thank you, Prince William, for having me. It’s amazing. To call attention to this age group especially, teens and young adults."
The prince reportedly performed a karaoke version of "Livin' on a Prayer" at his cousin Zara's wedding, and Bon Jovi invited him on stage to help with the song. But William said he would join him only if Swift came too.
Centrepoint, the center benefitting from the event, tweeted about the performance.
The New Jersey native said he was happy to finally meet Prince William, especially since he'd already met most of his family.
"I met his father and I met his grandfather," he told the Daily Mail. "He's still a young kid to me, but a nice young kid. The baby's next."
William is passionate about the cause they were supporting, and said he had first-hand experience of the homeless youth of London.
"A few years ago at about this time of year, for one night only, I gave up the comfort of my bed and tried sleeping on the streets of London," he explained. "That was just one night, and I knew I had a home waiting for me. Many others have no such comfort — the cold streets are the only reality they know. Our support, ladies and gentlemen, can allow them to secure themselves a bed, an education, a job, a future."
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