LAS VEGAS — The biggest star in the Super Bowl is not Chiefs great  Patrick Mahomes .

It’s tight end Travis Kelce, who is dating the biggest star in the world: Taylor Swift.

It’s hard to cast a shadow over Mahomes, but Kelce did so at Super Bowl Opening Night on Monday. The crowd of people — some reporters, some not — around his podium at Allegiant Stadium was at least twice the size of that surrounding Mahomes.

And they mostly wanted to know about one thing.

“Taylor’s fan base is absolutely unbelievable,” Kelce said. “The support they give her, the way they support what she loves in this world, it’s been awesome to see the NFL expand in that regard and hear how many young girls are getting into the game of football… It’s been awesome to hear.”

Swift is not believed to be in Las Vegas this week as she prepares for four shows in Tokyo, but is expected to fly in for the Super Bowl.

She won the Grammy Award for best album Sunday, and Kelce said that’s fueling his competitive side as he prepares to face the 49ers.

“She’s rewriting the history books herself,” Kelce said. “I told her I’ll have to hold up my end of the bargain and come home with some hardware, too.”

Swift’s win at the Grammy’s was her fourth for album of the year. Kelce is chasing his third championship ring.

Swift also made worldwide news at the Grammys by announcing her upcoming album, “The Tortured Poets Department,” will come out in April.

“I have heard some of it, and it is unbelievable,” Kelce said. “I can’t wait for her to shake up the world when it finally drops.”

The two began dating last year, and the first Chiefs game Swift attended was their 41-10 thrashing of the Bears at Arrowhead Stadium in Week 3.