WrestleMania 33 was the 33rd annual WrestleMania professional wrestling pay-per-view (PPV) and livestreaming event produced by WWE. It was held for wrestlers from the promotion's Raw and SmackDown brand divisions. The event took place on April 2, 2017, at Camping World Stadium in Orlando, Florida, and was the third WrestleMania held at the state of Florida after XXIV (at the same venue) and XXVIII. The New Day (Big E, Kofi Kingston, and Xavier Woods) served as the hosts of the event. It was the first WrestleMania to feature Goldberg since WrestleMania XX.

Thirteen matches were contested at the event, including three on the Kickoff pre-show. For the first time since WrestleMania 29 in 2013, two world championships were contested: Raw's Universal Championship and SmackDown's WWE Championship; it marked the first time that the Universal Championship, SmackDown Women's Championship, and new Cruiserweight Championship were defended at WrestleMania. In the main event, Roman Reigns defeated The Undertaker in a No Holds Barred match, giving Undertaker his second loss at WrestleMania. Whilst the loss and the events immediately following the main event served to insinuate that The Undertaker had retired, he would return to in-ring competition in 2018 at WrestleMania 34. In the main match for the Raw brand, Brock Lesnar defeated Goldberg to win the Universal Championship, thus becoming the first wrestler to win both the WWE and Universal titles, and in the main match from SmackDown, Randy Orton defeated Bray Wyatt to win his ninth WWE Championship. The event also marked the surprise return of The Hardy Boyz (Jeff Hardy and Matt Hardy), who won the Raw Tag Team Championship. It was also the first WrestleMania to be on the air past midnight Eastern time.

Reception towards the event was mixed, although it was largely considered to be an improvement over WrestleMania 32. Praise was directed towards Styles vs. McMahon, Owens vs. Jericho, the ladder match, Rollins vs. Triple H, and the Universal Championship match. Criticism was reserved for the main event, the WWE Championship match, and the overall length of the show, which stretched past the seven hour mark.