New York, July 3 -- Taylor Swift and Travis Kelce's much-anticipated wedding festivities have already started, with several celebrity friends spotted arriving at Madison Square Garden for the couple's rehearsal dinner, according to People.

Guests, including Lena Dunham, Jack Antonoff, Abigail Anderson, Erin Andrews, Charissa Thompson, Greg Olsen and Aric Jones, arrived at the venue, dressed in sequined and jewel-tone outfits for the occasion.

Antonoff, 42, was photographed heading into the venue in a suit, accompanied by his sister, fashion designer Rachel Antonoff, who wore a pink feathered dress and heels. Antonoff has been one of Swift's closest musical collaborators since 2013, having co-written and produced several of her hit songs...