George Kittle provides rave review of Taylor Swift's surprise performance at Tight End University

And the San Francisco 49ers tight end even spoke about the singer's surprise performance.

"Taylor could not have been kinder, more nice, and she was like, ‘I think it might be fun to go sing ‘Shake It Off.' And we were like, ‘It’d be amazing. Twist my arm, Taylor, please,'" George Kittle told Fox News Digital Wednesday. 

"She was fantastic. For the venue that, I think, it was maybe 1,000 people, that was the loudest 1,000 people I’ve ever heard in my entire life. It was an incredible experience. I think everybody had a lot of fun just watching that one live."

Swift went up and performed her song "Shake It Off" from her album 1989, which had everyone going crazy. And that included her boyfriend Travis Kelce, who was watching and cheering her on from the side. 

The NFL even posted a photo of Swift's surprise performance, and Travis couldn't help but comment on it. 

Turn me up Tay Tay!!!," The Kansas City Chiefs tight end wrote. 

Everyone is a Swiftie, including Kittle!