Why him? Well, if you are starring in your own real-life romantic comedy, and you happen to be friends with one of the greatest rom-com actors of the past 30 years... why not?
The Wedding Singer actor has previously spoken about his friendship with the couple. "Taylor's so damn nice to my family and has always been," he told Entertainment Tonight, external last year.
"She's ridiculously nice to them and warm, and Travis is such a gentle, nice guy. Funny as hell. He's like the guys I grew up with."
Taylor's song Wi$h Li$t, from her latest album, was inspired by Sandler's character in 1996 film Happy Gilmore.
"He has this happy place where he goes into," she told Apple Music's Zane Lowe. "This is where he escapes to mentally in times of stress, pressure, anxiety or chaos.
"And that chorus of that song is me just describing what my happy place is."
Kelce made a cameo appearance in Sandler's Happy Gilmore sequel last year, and the actor returned the favour by appearing on the Kelce brothers' New Heights podcast.
There are no photos of the wedding dress yet, but we do know who designed it.
"The bride and groom's wedding ceremony looks have been created by Christian Dior Haute Couture," Swift's spokeswoman revealed on Friday.
"They are designed by Jonathan Anderson, Creative Director of Dior Women's, Men's and Haute Couture Collections, in close collaboration with the Bride and Groom.
"This is the designer's first couture wedding dress for a world-renowned celebrity."
Anderson, from Northern Ireland, is a former creative director at Loewe, and took over Dior last year.
In a statement, Dior said it was "delighted to confirm it has created the wedding looks for the marriage of Taylor and Travis", which were "created in Dior's ateliers at 30 Avenue Montaigne, Paris" by Anderson "in close collaboration with the couple".
Around 1,000 names were reportedly on the guest list, including some of the biggest stars from music, Hollywood and sport.
Selena Gomez, Camila Cabello, Hugh Grant, Gracie Abrams, Gigi Hadid, Bradley Cooper, Tom Hanks, Millie Bobby Brown, Ellie Goulding, Graham Norton, Dakota Johnson, Steven Spielberg, were among the A-list attendees.
Many more drove straight in and out, away from the view of media and photographers.
Other rumoured names include Sabrina Carpenter, Jennifer Lawrence, Lana Del Rey, Lena Dunham, Emma Stone, the Haim sisters, Sir Paul McCartney, Zoe Kravitz, Stevie Nicks, Nicole Kidman, Reese Witherspoon and Greta Gerwig.
Guests are assumed to be under instructions not to give away details or photos, and rapper Nelly is one of the few to have posted on Instagram, writing: "S/O [shout out] to @taylorswift & @killatrav..!! Wedding was incredible."
