While neither has confirmed plans publicly, the New York Post reported on Thursday that the two had already wed, citing unnamed sources.
The streets around New York's Madison Square Garden have been filled for days by workers unloading food and scenery into the concert venue, which is in its longest stretch of the summer with no concerts or sporting events scheduled.
Officials including New York mayor Zohran Mamdani have dropped hints that something is coming, and US media have reported the pair plan a cocktail hour for 1000 people at the start of a long holiday weekend when the nation celebrates the 250th anniversary of its Declaration of Independence from British rule.
The buzzy event coincides with brutally hot weather that will likely test the stamina of onlookers hoping to catch a glimpse of the celebrity couple or their famous guests.
The couple's love story began in 2023 when Kelce tried unsuccessfully to meet Swift backstage at one of her concerts, but succeeded in capturing her attention and warming her heart by recounting his disappointment on a podcast.
As the relationship grew, they appeared publicly together at her concerts, his Kansas City Chiefs games and on Saturday Night Live, leading to an August 2025 engagement announcement on Instagram that read "Your English teacher and your gym teacher are getting married".
Many of Swift's chart-topping songs have explored her relationship problems and desire for love, and the engagement set off intense speculation among her hundreds of millions of fans about wedding details, which the couple - both 36 years old - guarded carefully.
One of the most successful musicians ever, the writer of Love Story and Shake It Off has won 14 Grammy Awards and shattered records with a global concert tour that made her a billionaire.
Kelce, one of the National Football League's best-known players, helped the Kansas City Chiefs win three Super Bowls.
He also co-hosts the popular sports and pop culture podcast New Heights.
In June, Swift was inducted into the Songwriters Hall of Fame, 20 years after her first hit single.
Beginning in country music before finding pop megastardom, Swift has won an unparalleled four Grammy album of the year awards.
And her latest, The Life of a Showgirl, sold more copies than any other album in its first week.
Kelce first tried to meet Swift after she performed at Kansas City, Missouri's Arrowhead Stadium, the home of the Chiefs, as part of her Eras Tour, a retrospective of her two-decade career.
He failed to make it through security and said on his podcast he was "a little butthurt" he did not get the chance to meet Swift and give her a friendship bracelet bearing his phone number.
Swift was charmed, recounting on a later New Heights episode that the gesture reminded her of "an '80s John Hughes movie, and he was just like, standing outside of my window with a boom box and being like, 'I want to date you.'"
She said she thought, "If this guy isn't crazy, which is a big if, this is sort of what I've been writing songs about wanting to happen to me since I was a teenager."
The athlete explained their chemistry in an interview with GQ magazine.
"We are two fun-loving people who have the morals to appreciate everyone for who they are," Kelce said.
"We share all those values."
