NEW YORK (AP) — Taylor Swift and Travis Kelce's Madison Square Garden wedding is fast approaching, and guests in formalwear are arriving in high heat and humming buzz in Midtown Manhattan.

The long anticipated union of sports and song has brought hype to new heights at a venue usually reserved for big games and bucket-list concerts. It was expected to begin at 5 p.m., with the close friends and family of the Kansas City Chiefs tight end and the pop superstar in attendance along with several hundred others.

An Associated Press camera outside the arena showed a line of black SUVs dropping off wedding-goers in tuxedos and evening gowns, surrounded by New Yorkers in shorts and Swifties amassing for the occasion.

Actor Hugh Grant with his wife Anna Eberstein, Chiefs running back Kareem Hunt, Seattle Seahawks receiver Cooper Kupp and Jenny Han, author of the “The Summer I Turned Pretty” series, were among those entering the arena. The New York Times reports that Swift’s childhood friend and sometime song subject Abigail Anderson Berard also appeared to be headed there.

Celebrities, athletes and friends were posting on social media about getting ready or about to leave for a black-tie event, including Brandon Borders, producer of the New Heights podcast starring Kelce and his brother Jason Kelce; Beau Allen, retired defensive lineman for the Philadelphia Eagles; and Jessica Chastain.

Heavy secrecy has left plenty of blank spaces that media outlets and fans are seeking to fill in. A city permit obtained by the AP shows that Friday's wedding event could last until 4 a.m. Guests appeared as though they were coming to a big awards show, but their arrivals were obscured by tents and gazebos in an odd mix of hype and hush.

Outside the arena, some frazzled tourists joked that it was a bad weekend to visit as they navigated strict road and sidewalk closures, but others appeared happy to sneak a peak at the spectacle. Police cut off most access where guests were being dropped off, but a few patrons gathered in nearby businesses ahead of World Cup matches and peered out windows.

The relationship of the pop star and the football player has continued to thrill and fascinate millions around the world — particularly the Swifties, the pop star’s enormous and ardent fan base — for the past three years ever since the pair first started dating.

Key questions remain over how Swift and Kelce have transformed MSG into a wedding venue fit for a billionaire and the star tight end for the Kansas City Chiefs, as well as who may perform and who will officiate. Trucks and crews have been going in and out of the venue for days, setting up tents and whisking massive materials inside, setting off more speculation about MSG's makeover.

And while fans have seen Swift wear wedding dresses in plenty of music videos over the years, many also remain eager to see what looks she will unveil at the wedding.

The wedding is taking place during a jam-packed weekend even by New York's standards. It's the July Fourth weekend, where the city will be partake in celebrating the nation's 250th birthday. Separately, a parade of dozens of tall ships will take place on the Hudson River, and a World Cup game is scheduled in New Jersey.

Earlier this week, Swift and Kelce donated $26 million to 20 local and national charities across the U.S. Many of the organizations were located in areas where the couple has deep ties, including Nashville, Tennessee; Los Angeles; Kansas City, Missouri; and New York.