Just call him Taylor Swift’s “brother-in-law.”

Jason Kelce was given a new moniker when he made a surprise appearance at WWE Wrestlemania Saturday.

The 36-year-old retired NFL player, along with his former teammate Lane Johnson, secretly crashed the match between Dominik Mysterio and Santos Escobar. The two were decked out in Philadelphia Eagles headpieces that covered their entire faces in an attempt to remain low-key.

However, when they removed their masks and matching black tank tops to reveal their identities, broadcaster Pat McAfee said, “Welcome to Wrestlemania, Philadelphia Eagles.”

Jason Kelce
The retired NFL player was referred to as Taylor Swift’s “brother-in-law” at the event.Joe Camporeale-USA TODAY Sports

Taylor Swift
Swift is dating the former NFL’s star brother, Kansas City Chiefs tight end Travis Kelce.AFP via Getty Images
Another announcer was quick to reference Swift, 34, when they quipped, “Isn’t that whatshername’s brother-in-law?”

The “Pat McAfee Show” host, 36, then belted out her hit song “22” before clarifying, “Is that who you are talking about?”

Jason’s younger brother, Travis Kelce, began dating the “Love Story” songstress last summer and the couple have been dominating sports headlines ever since.

Lane Johnson, Jason Kelce
Jason crashed the match with one of his former Eagles teammates.Joe Camporeale-USA TODAY Sports

Jason Kelce
They even ripped off their masks and tank tops after jumping in the ring.Getty Images
Jason’s wife, Kylie Kelce, recently dished on Travis’ relationship with the pop superstar, admitting that their family wasn’t used to being under such an intense microscope.

“It’s interesting. I am trying to take it in stride and just make sure that as people are talking about me, it’s about important things,” she said on “Today” last week, referencing the Eagles Foundation charity.

Both Kylie and Jason spent considerable time with the Grammy winner throughout the 2023 NFL season, which ended in February with Travis’ third Super Bowl win and Jason’s emotional retirement announcement.

Travis Kelce and Taylor Swift
The pop star and the three time Super Bowl champion began dating last summer.GC Images

Travis Kelce, Taylor Swift
Swift was on hand to cheer him to victory in the 2024 Super Bowl in February.Getty Images
“Ultimately, if Travis is happy, we’re happy,” Kylie, 32, went on.

The mother of three – who shares daughters Wyatt, 4, Elliotte, 3, and Bennett, 1 – with the future Hall of Fame center, said she and her family are “always cheering on Uncle Trav.”

“It’s such a treat to be able to do that on and off the field, but it’s been amazing,” she explained, when asked about observing Swift’s romance with her brother-in-law, 34, “close up.”

Swift and Travis were most recently spotted packing on the PDA in the Bahamas while enjoying the NFL offseason and the singer’s hiatus from her record-breaking Eras Tour.