Taylor Swift's friends are ready to celebrate the wedding of a showgirl.

Ahead of the "Blank Space" singer and Travis Kelce's rumored nuptials at Madison Square Garden, some of her closest friends—including Selena Gomez and Jack Antonoff—were dressed in black-tie attire as they seemingly headed to a rehearsal dinner on July 2.

Selena, 33, wore a strapless black dress with lace detailing, as seen in a video posted on her Instagram Stories. Set to Ariana Grande's "7 Rings," the footage showed the Only Murders in the Building star applying lipstick from her Rare Beauty line as she sat in the back of a luxury car.

Meanwhile, Jack, 42, donned dark brown suit with leather loafers as he stepped out in the Big Apple alongside his older sister Rachel Antonoff, who donned a strapless, pink fringed gown with metallic silver heels and a red handbag.

Jack's ex Lena Dunham, who's kept a close friendship with Taylor after the couple's 2017 breakup, was also spotted in formalwear around the same time. In a video published by People, the Girls creator sat in the back of a black SUV as she arrived at MSG.

But those weren't the only familiar faces recently spotted out in New York. Swift's frequent musical collaborators Ed Sheeran and Aaron Dessner visited BuonaSera on the Lake, an Italian restaurant located upstate, while Sabrina Carpenter dined at Emmett’s on Grove in the Big Apple's West Village neighborhood.

And just earlier on the morning of July 2, Travis' mom Donna Kelce touched down at LaGuardia Airport, skipping a detour through Cornelia Street and heading straight to the apparent wedding venue.

Neither Taylor or Travis, both 36, have publicly spoken out about where their nuptials will take place, though major activity around MSG suggest a lavish bash at the arena.

What's else should you know about what's sure to be the wedding of the century? Read on to find out.

Are Taylor Swift and Travis Kelce getting married at Madison Square Garden?

Reports that Swift and Kelce will wed at the historic New York City arena—home of the Knicks and Rangers, as well as countless major musical moments through the years—have only picked up steam since Page Six first put it out there June 5.

The bride and groom have not confirmed this, nor have they denied it.

Meanwhile, the rationales for getting married in such a venue have multiplied, from the relentlessly tight security infrastructure that's already in place to the fact that simply being indoors in a space with underground parking and no windows is a good way to avoid photographers peeping from above with helicopters and drones.

While the musical guest possibilities are endless, should Swift take the stage on her big day it will mark her first performance at MSG since the Z100 Jingle Ball on Dec. 13, 2019—a.k.a. her 30th birthday.

You'd think more rich and/or famous people would've said "I do" at MSG since 1964. But the most memorable vow swaps to date remain Sly Stone marrying Kathy Silva onstage in front of 20,000 Sly and the Family Stone fans in 1974, and when 2,075 couples wed in 1982 at a mass Unification Church ceremony presided over by Sun Myung Moon.

But people and companies do book events there, with rates starting in the thousands to rent a luxury suite and veering toward $1 million-plus to buy out the arena.

Knicks owner James Dolan told WFAN that reporters got "half of it wrong" in speculating that Swift and Kelce were given free NBA Finals tickets in exchange for paying top dollar to hold their wedding at MSG.  

"Travis is in a mandatory training camp," Dolan added, possibly clarifying that he meant Swift alone got complimentary courtside seats and the rest is true. But possibly not.

What's the significance of Taylor Swift and Travis Kelce's rumored wedding date July 3?

Aside from July 3 being a blank space on MSG's calendar, Swift loves to go all out for Fourth of July—which conveniently falls on a Saturday this year. You know, to make it a wedding weekend.

But don't discount the numbers game, Swift reminding during her August New Heights appearance, "I love numerology. I love math stuff, I love dates."

It's also a convenient time for the groom, whose 14th NFL season doesn't kick off until September. (And official training camp doesn't start until July 29.)

Kansas City Chiefs coach Andy Reid said during a June 11 news conference that he'd witnessed "no distractions" for Kelce in the off-season, quipping, "If it's like when I got married, my wife did everything
Maybe he's doing more, but he looks like he's pretty focused in on this job, too."

Who is coming to Taylor Swift and Travis Kelce's wedding?

Real ones like Reid are exercising their right to remain silent, the bemused 68-year-old telling reporters, "Can't talk about it."

Jason Kelce's wife Kylie Kelce advised on her podcast back in April, "To literally everybody, I know it usually comes from a good place, not always, but quit asking me and my mother-in-law about upcoming nuptials."

And at this point, it's tough to say who's being cheeky and who's being sincere about getting an invitation, with everyone from Niall Horan to Prince William down as a maybe.

“I’m gonna go to Taylor’s wedding, and maybe I’ll get some inspiration," Swift's friend Suki Waterhouse, who's engaged to Robert Pattinson, told Variety when asked about her own nuptial planning. "It will be amazing."

Swift was en route to Australia when Karlie Kloss got married in 2018, but the model reportedly is on the singer's guest list.

And the bride-to-be did indicate she'd be going with the adage of "the more, the merrier," if not an MSG-capacity crowd of 22,000.

"I know it’s going to be fun to plan because I think the only stressful weddings are when you have a small amount and people are on the bubble," Swift told Graham Norton in October when she extended an invite to the talk show host on-air. "You have to evaluate or assess your relationship with them to see if they should be there—I’m not gonna do that.”

Several notable wedding planners have been linked to the Swift-Kelce nuptials.

Tara Guérard had to clarify in April that she was not the 1, presumably to protect her actual clients from a swarm of Swifties descending on their June 13 wedding at the Ocean House in Westerly, R.I.

Some fans made the trip anyway, but the nuptials were otherwise undisturbed.

Page Six has since identified Mark Seed—whose past clients include Jennifer Lawrence—as Swift's chosen wedding planner. Reportedly known for his discretion, Seed has not commented.

Did New York City Mayor Zohran Mamdani really confirm Taylor Swift's wedding timeframe? 

What does the mayor know and when did he know it? While discussing World Cup security at a June 15 news conference, Mamdani noted that his city is "used to big events" and they were "incredibly excited" for further soccer action at MetLife Stadium.

"We know it coincides with the Knicks’ Finals run," he continued. "We know it coincides with July 4, America 250, Taylor Swift’s wedding—all happening at the same time—and we are so excited to welcome the world here.”

Mamdani will only be playing a role in some of those events, however, the mayor noting, "I wish them a lovely wedding. I'll listen to 'Only the Young' at home on my own."