The engagement of a Kansas City Chiefs tight end, Travis Kelce, to pop star Taylor Swift couldn’t have come at a better time for the National Football League. Just days away from the opening of its 2025 season, the announcement of their impending union is a marketing windfall for the league.

The internet went berserk Tuesday when the couple announced their engagement on Instagram. According to Meta, the collaborative post of pictures set records, with 1 million reposts in less than six hours and more than 14 million likes in the first hour.

Considering it’s hard to mention Mr. Kelce without saying he plays for the Chiefs, the social media frenzy is essentially free advertising for a league ready to start its already much-anticipated regular season.

The defending Super Bowl champion Philadelphia Eagles play the Dallas Cowboys on September 5, followed by what is sure to be a ratings bonanza when the Chiefs host the Los Angeles Chargers in a standalone nationally televised game the next day.

Pure football traditionalists might not appreciate the attention given to the couple’s relationship, especially on game day, but the Kelce-Swift union has proven to be good business for the NFL since the two began dating in 2023.

Even President Trump, who has often been a Taylor Swift antagonist, seems to be on board. “I wish him a lot of luck,” Mr. Trump said of Mr. Kelce. “I think he’s a great player. I think he’s a great guy. And I think she’s a terrific person. So I wish them a lot of luck.”

While the opening of the NFL season is an annual headline-grabber, the impending marriage of Mr. Kelce and Ms. Swift gives the league something it couldn’t have created on its own — the perfect merger between sports and pop culture. 

Ms. Swift, with her Swifties following, earns attention wherever she goes, and is sure to constantly be in the news with the impending release of her new album, “The Life of a Showgirl,” set for October 3. Now her brand overlaps Mr. Kelce’s career, the Chiefs, and the league.

Ms. Swift admitted during her recent appearance on the “New Heights” podcast, co-hosted by Travis and his brother Jason, that she knew nothing about football when she began dating the Chiefs’s Pro Bowl tight end, but has become an avid fan.

“She knows what the injury report looks like,” Travis Kelce said recently. “She understands what special situations are, third and short and all these things because she just naturally loves to hear about my job.”

Thanks to Ms. Swift, and her growing appreciation for football, the NFL now has access to an audience it has struggled to engage — younger fans, especially young women, and international viewers who may not know the difference between a first down and a field goal but love Ms. Swift.

Sales of merchandise, especially Chiefs gear, should also see a spike as Ms. Swift’s fan rush to support her partner. Her appearances at Chiefs games have been good for business in Kansas City. Mr. Kelce’s jersey and whatever gear Ms. Swift wears to his games now goes from simple sports apparel to pop cultural memorabilia.

Their union is sure to make the NFL’s fashion brand more appealing globally, especially among younger fans, who tend to view jerseys, hats, and other gear as cultural statements more than evidence of team loyalty. Witness all the New York Yankees caps worn by men and women from Europe to Australia who know little about the team.

Together they are a publicity engine that keeps running week after week with photos, podcasts, and constant social media buzz. For the NFL, this engagement is more than a personal celebration, it represents a business touchdown.