Following the wedding of pop star Taylor Swift and American footballer Travis Kelce in New York on 3 July 2026, the prediction markets that had built up around the event began paying out. The nuptials generated more than $6.3 million in total trading volume across major platforms such as Kalshi and Polymarket, with bettors wagering on details ranging from the venue and date to the dress designer and guest list. Notably, many of those placing bets were Swift's fans — mostly women — a number of whom entered a prediction market for the first time.

Contracts for Madison Square Garden as the venue rose above 80 cents on the dollar before resolving to "Yes", with tell-tale signs including barricades outside the arena and NYPD plans for a large Midtown event. Bettors correctly predicted a custom Dior gown (60.5 per cent) and that Jason Kelce would be best man (94 per cent), but those backing Abigail Anderson Berard as maid of honour (85 per cent) lost out, as the couple opted for no traditional wedding party — Austin Swift served as "man of honour". Guest-list bets were mixed: close friends such as Selena Gomez and Patrick Mahomes attended, while Blake Lively's absence prompted speculation. Adam Sandler officiated, and Stevie Nicks and Paul McCartney performed at the reception.