Harry Styles fans think he made sweet tribute to his ex-girlfriend Taylor Swift on her wedding day

Hundreds of celebrities were invited to Taylor Swift and Travis Kelce's wedding, but not every one of them could make it.

The USA's very own rendition of a royal wedding took place this weekend, with pop star Taylor Swift tying the knot with partner Travis Kelce, an American footballer for the Kansas City Chiefs.

Despite taking place in the heart of the thriving metropolis of New York City inside the worlds' most famous arena, Madison Square Garden, much of the multi-day celebration has been shrouded in secrecy.

Some details of the event have emerged, though, like that it was officiated by Adam Sandler, the gift boxes some guests were given during the dress rehearsal, and the crude joke Lena Dunham made during that smaller gathering of 100 people on July 2.

The main event came on Friday, July 3, with 1,000 guests descending upon MSG, with countless famous faces arriving in blacked-out SUVs before being hurried inside away from prying eyes.

Yet, it's difficult to stay hidden from those pesky cameras in the middle of New York and a throng of celebrities were spotted dressed to the nines on their way to the ceremony.

Dua Lipa, Bradley Cooper and even Graham Norton all made the cut, but Harry Styles was nowhere to be seen.

However, he still managed to pay tribute to Swift on her big day.

Harry Style's pays tribute to Taylor Swift on wedding day

Harry Styles and Taylor Swift were together in 2012 (David Krieger/Bauer-Griffin/GC Images)

Styles and Swift are exes having dated back in 2012, but there isn't any Bad Blood between the pair and he was reportedly invited to the do with his partner, actor Zoe Kravitz.

However, the former One Direction star is a bit busy at the moment as he's still in the middle of his record-breaking 12-night run at Wembley Stadium, a record once held by Swift.

As Styles had gigs set in stone in London on July 3 and 4, he was unable to fly over to New York to be in attendance.

However, fans believe he paid tribute to Swift as he sung the song 'Two Ghosts' for the first time during his Together Together shows.

Both Swifties and... Stylies(?) have long believed the song is about Swift thanks to the similarities with the American's aptly-named song 'Style.'

The colourful numbers each contain lyrics referencing blue eyes, red lips and white shirts, and Styles hadn't sang it since a gig at London's Meltdown Festival on June 16.

Fans have gone wild over it on social media.

"HARRY STYLES JUST SANG TWO GHOSTS ON TAYLOR SWIFTS WEDDING DAY WHAT IS HAPPENING," one excited X user wrote in all caps.

Another wrote: "Taylor Swift wedding and Harry Styles singing two ghosts and crying on stage is straight out of a fan fiction I was writing in my teens as a Haylor shipper."

A third said: “COMPLETELY CRAZY! Harry pulling a chorus of ‘Two Ghosts’ with the fans today at #TogetherTogetherLondon."

What's on the menu at Taylor Swift and Travis Kelce’s wedding?

According to Page Six, a whole load of food and ingredients were spotted being delivered to Madison Square Garden ahead of the couple’s big day, giving fans an insight into what guests might be chowing down on.

It seems that attendees are in for some fine dining as boxes containing lobster meat were seen being transported into the venue.

Swift and Kelce also appear to be big fans of chicken, with several variations of the meat - including breasts, legs, boneless and blackened - reportedly labelled on the boxes that were delivered.

Packages of French fries and thick-cut onion rings were also seen, as well as fresh produce such as red and orange peppers and romaine lettuce, along with eggs, whole milk and heavy whipping cream.

A Krispy Kreme van also reportedly pulled up to MSG, though it’s unclear whether wedding guests are being treated to an Original Glazed Dozen, as there is a doughnut store located nearby.

A source claiming to have ‘direct knowledge’ told TMZ that Swift ‘personally curated food stations’ for her nuptials, reportedly featuring ‘speciality bites’ from a number of her ‘go-to spots’.