Oh, and Emma Watson hung out with them backstage.
The Taylor Swift BFF Tour made a stop in London on Saturday night when the singer brought six of her famous pals on stage during her latest concert.
Kendall Jenner, Cara Delevingne, Gigi Hadid, Martha Hunt, Karlie Kloss and tennis star Serena Williams all came out to strut their stuff as Swift sang her hit “Style” at the Hyde Park show.
“The squad in London,” she captioned a group photo on Instagram.
Off stage, that squad got even bigger. Emma Watson was on hand too, as seen in this photo shared by singer Lauren Aquilina.
Watch Swift’s “Style” squad in action in the video below.