From Hollywood's biggest stars to the NFL elite, A-listers from around the globe are gathering in their black tie best for Taylor Swift and Travis Kelce's extravagant $15 million Madison Square Garden wedding.The pop star and Kansas City Chiefs tight end are hosting 1,000 people at New York City's most famous arena tonight as their wedding celebration enters its second day.Swift spent the morning getting ready for the big day with her reported bridesmaid Gigi Hadid, who was spotted in the back of a car wearing a pink dress as she headed to the soiree with her boyfriend Bradley Cooper.Other celebrities who've descended on the Big Apple in the 100-degree heat today include bridesmaid Selena Gomez, Swift's longtime friend and producer Jack Antonoff and several NFL players.The couple have been tight-lipped about their nuptials, with the bride going as far as confiscating guests' phones at the door.The event has shut down streets around the arena, where 130 NYPD officers are sweating it out in the heatwave. Swifties and onlookers alike have gathered outside Madison Square Garden, despite the street closures, in hope of catching a glimpse of the A-list wedding of the year. And it's clear the couple have ranked their guests in tiers. Some have been seen walking into the venue via security barricades from the street, while others were ushered through in VIP cars.A group of guests were even seen removing their tuxedo jackets as they were searched by security. Taylor Swift and Travis Kelce's extravagant Madison Square Garden wedding celebration cost over $15 million Swift spent the morning getting ready for the big day with her reported bridesmaid Gigi Hadid , who was spotted in the back of a car wearing a pink dress as she headed to the soiree with her boyfriend Bradley Cooper Bradley Cooper was spotted in his tuxedo ahead of Taylor Swift and Travis Kelce's wedding Taylor Swift's publicist Tree Paine, flanked by security, looked glamorous Friday night as she headed to MSG The singer's childhood best friend Abigail Anderson Berard, who tapped Swift to be her bridesmaid nine years ago, also flashed smiles at the cameras before going to MSG Travis Kelce's uncle, Don, Donna Kelce's brother, stepped out in a tuxedo for his nephew's wedding celebration Eras tour opener Benson Boone heads to MSG in a pair of large sunglassesThe guest list appears to be a nice blend of Hollywood and ESPN, with sports stars, actors and musicians turning up to support the couple. Jay-Z and his daughter Blue Ivy Carter, as well as director Steven Spielberg, were spotted in the city today ahead of the celebration.Kelce's close friend and former Kansas City Chiefs teammate Ross Travis was pictured heading to the wedding party. San Francisco 49ers fullback Kyle Juszczyk also arrived at MSG with his hands full of canned beverages and his wife, Kristin, on his arm.Los Angeles Rams quarterback Matthew Stafford and his wife, Kelly, wore matching green suits and dresses to the glamorous wedding bash. United States Women's National Soccer legend Abby Wambach, a longtime friend of Swift, arrived at MSG holding hands with her wife, author Glennon Doyle. A group of guests were even seen removing their tuxedo jackets as they were searched by security United States Women's National Soccer legend Abby Wambach arrived at MSG holding hands with her wife, author Glennon Doyle Kelce's close friend and former Kansas City Chiefs teammate Ross Travis was pictured heading to the wedding party San Francisco 49ers fullback Kyle Juszczyk arrived at MSG with his hands full of canned beverages and his wife, Kristin, on his arm New Heights producer Brandon Border and his fiancée Lauren Winn were dressed to the nines as they headed to the venue Border and Winn shared a car with the show's senior director of social media, Jake Chatzky, and his pregnant wife Emily Los Angeles Rams quarterback Matthew Stafford and his wife, Kelly, wore matching green suits and dresses to the glamorous wedding bash Publicist Tree Paine heads to MSG for the second night of Taylor Swift and Travis Kelce's wedding celebrations The daughter of NHL legend Wayne Gretzky, Paulina Gretzky, arrived at MSG in an SUVBoth Swift and Kelce have extended invites to key members of their press teams, with Swift's longtime publicist Tree Paine being among the first guests to head to the venue.Kelce's podcast producer, Brandon Border, and his fiancée, Lauren Winn, shared a car with Jake Chatzky, the senior director of social media for New Heights, and his pregnant wife Emily as they made their way to the party.The singer's childhood best friend Abigail Anderson Berard, who tapped Swift to be her bridesmaid nine years ago, also flashed smiles at the cameras before going to MSG.The couple, their parents and siblings have not been seen in public, but Kelce's uncle, Don, brother to his mother Donna, stepped out in a tuxedo for his nephew's wedding celebration. Swift and Kelce welcomed 100 of their closest friends at a 'rehearsal dinner' on Thursday night.Experts revealed that the celebration for the couple, both 36, costs over $15 million, and taxpayers footed over $1 million to help cover the bill. Karlie Kloss stepped out in New York City wearing a gold dress while her husband, Josh Kushner sported a tux. Kloss and Swift, who were once inseparable, have not been seen together much in recent years Jason Sudeikis was spotted in a tuxedo outside of MSG Alex Pall and Drew Taggart, the electronic duo known as The Chainsmokers, posed with a martini before heading to Taylor Swift and Travis Kelce's wedding. The duo released a remix of Swift's song The Fate of Ophelia, from her latest album The Life of a ShowgirlOne insider told The New York Times it would cost between $1.2 million and $1.6 million to book out Madison Square Garden for two days.Insurance would cost over $10,000, Erica Maurer, a partner at EMRG Media, told the newspaper.Lighting, sound, catering, flowers, decorations and labor could cost between $10 million and $12 million, The Times suggested, while adding that their estimate was a very conservative one. Permit fees for the two-day affair would likely cost at least $132,000 based on the city’s permitting office rates.It would also cost taxpayers over $1 million to have hundreds of police officers providing security and patrolling MSG.Photos taken on Friday afternoon showed scores of New York City cops in their uniforms drenched with sweat as they stood guard close to the Garden in 100F heat. Droves of Taylor Swift and Travis Kelce's wedding party guests were seen walking into Madison Square Garden in the sweltering heat and passing through security on foot Other VIPs were brought in cars and went straight into the venue Swifties and onlookers alike gathered outside Madison Square Garden it the sizzling heat to catch a glimpse the A-list wedding celebration guests Guests arrive at Madison Square Garden for Taylor Swift and Travis Kelce's wedding NYPD officers were seen drenched with sweat on Friday afternoon while standing guard close to Taylor Swift's wedding celebrations in 100f heat A lone protestor stands outside Madison Square Garden, holding a sign that branded Taylor Swift as a 'monster'Ahead of their celebration, Swift and Kelce donated $26 million to 20 charities. The unusually specific number has sparked speculation that it matches the actual cost of their wedding celebrations. The bride arrived at Thursday's event two hours before its start time in a blacked-out silver Chevrolet Suburban with an extended roof and communication antennas.She was later seen returning home well after midnight, having spent more than eight hours partying at what was said to be her first-night bash.There are unconfirmed reports that Swift and Kelce are already legally married, but will have a second celebration with all of their guests today.Famous guests including Selena Gomez, Jack Antonoff, Gigi Hadid and Bradley Cooper, as well as the singer's childhood friend Abigail Anderson, were seen heading inside on Thursday, while Taylor was spotted being swept into the back.As we previously reported, the dress code for Thursday's event was 'cocktail attire', a source said, with only family members and close friends invited.Outsiders were given a few rare glimpses of how the pop singer and the Chiefs tight end transformed the venue into the wedding celebration of their wildest dreams.Pink, orange and yellow roses were photographed woven into foliage at the top of an escalator on Thursday night. One insider told The New York Times it would cost between $1.2 million and $1.6 million to book out Madison Square Garden for two days A huge battalion of NYPD officers is seen sweating close to Madison Square Garden on Friday afternoon Lighting, sound, catering, flowers, decorations and labor could cost between $10 million and $12 million. Pictured: Roses inside the venue on Thursday night It would also cost taxpayers over $1 million to have hundreds of police officers providing security and patrolling MSGThe venue was lit up with lights and adorned with dusty pink curtains.It's been said that Swift built a custom 'castle' inside MSG and has supposedly bought every available calla lily in the city.Guests descended upon the theatre to the most exclusive invite in town in stunning ensembles.Sports commentator Erin Andrews, former football player Ross Travis and NFL WAG Claire Kittle were all among the famous faces to flaunt their fashion credentials.The stars brought traffic to a halt with police banning the press from assembling near the venue and even threatening to arrest those who don't comply.They hung curtains on the arena's large windows and erected an arrivals tent which blocked the public's view of who was there.A sign at a security checkpoint outside the venue instructed guests to 'have identification out, have devices ready', suggesting attendees were forced to give up their phones before entering.