WrestleMania XX was a 2004 professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE). It was the 20th annual WrestleMania and took place on March 14, 2004, at Madison Square Garden in New York City, New York, held for wrestlers from the promotion's Raw and SmackDown! brand divisions. This was the third WrestleMania at Madison Square Garden, after WrestleMania I in 1985 and WrestleMania X in 1994, and the fourth of six WrestleManias in the New York metropolitan area, alongside WrestleMania I, 2, X, 29, and 35. This is the most recent WrestleMania to be held at Madison Square Garden and its calendar date of March 14 is the earliest date for a WrestleMania.
The match card featured two billed main events. The card's final match, which was the main event for the Raw brand, was a triple threat match for the World Heavyweight Championship, which saw champion Triple H defending the title against Shawn Michaels, and that year's Royal Rumble match winner, Chris Benoit, who won the match, making Triple H submit via the Crippler Crossface, resulting in his first and only world championship in WWE. The main event for the SmackDown! brand featured Eddie Guerrero versus Kurt Angle for the WWE Championship, which Guerrero won by a Small Package pin. The event also featured the return of The Undertaker in his Deadman persona, who defeated Kane after a Tombstone Piledriver. John Cena made his in-ring WrestleMania debut at the event, defeating Big Show to win his first title in WWE, the WWE United States Championship.