One Night Only was a professional wrestling pay-per-view (PPV) event produced by the World Wrestling Federation (WWF) that took place on September 20, 1997, at the NEC Arena in Birmingham, England.

One Night Only featured professional wrestling matches involving different wrestlers from pre-existing scripted feuds, plots and storylines that were played out on Raw Is War and other World Wrestling Federation (WWF) television programs. Wrestlers portrayed a villain or a hero as they followed a series of events that built tension, and culminated into a wrestling match or series of matches.

The event featured eight matches, with two main events. In the first main event, The Undertaker challenged Bret Hart for the WWF World Heavyweight Championship in a rematch from the previous month's SummerSlam event, where the Undertaker had lost the title in controversial circumstances. This bout was not featured on the promotional poster for the event, which Hart resented and attributed to the backstage politics of Shawn Michaels and Triple H; he said The Undertaker was similarly bemused by the omission (the match was also inexplicably removed from the North American VHS release, but included on the British VHS release and on the later DVD release on both sides of the Atlantic). To close the show, Michaels challenged The British Bulldog for the WWF European Championship, as part of his ongoing feud with The Hart Foundation. The WWF Tag Team Championship was also defended on the card, with Los Boricuas members Savio Vega and Miguel Pérez, Jr. challenging champions, The Headbangers.

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