WrestleMania XXVII was the 27th annual WrestleMania professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE). It was held for wrestlers from the promotion's Raw and SmackDown brand divisions. The event took place on April 3, 2011, at the Georgia Dome in Atlanta, Georgia. The event was the first WrestleMania held in the state of Georgia and the second to be held in Southeastern United States, following WrestleMania XXIV. It was also the final WrestleMania held during the first brand extension, which ended in August, but was reinstated in July 2016. This was also the company's final event to be promoted under the full name of World Wrestling Entertainment, as immediately following this event, the company strictly began to refer to itself by the WWE abbreviation. Dwayne "The Rock" Johnson served as the host of the event.

The event's card consisted of eight matches, including three main matches. The final match of the event was the main match from Raw, where The Miz defeated John Cena to retain the WWE Championship thanks to help from The Rock, setting up the main event of WrestleMania XXVIII between Rock and Cena. SmackDown's main match saw Edge defeat Alberto Del Rio to retain the World Heavyweight Championship—this would be Edge's final match until 2020. In the other marquee match, The Undertaker defeated Triple H in a No Holds Barred match to extend his undefeated WrestleMania streak to 19–0. This is the first and so far only WrestleMania in which no championships changed hands.

Tickets for the event commenced sale to the public on November 13, 2010. According to WWE's second-quarter earnings report, WrestleMania XXVII generated 1,059,000 PPV buys, up roughly 30% domestically and 15% internationally from the previous year. The event grossed US$6.6 million in revenue with 71,617 in attendance, making it the third highest grossing event in WWE behind WrestleMania 25 and the next year's event WrestleMania XXVIII. It generated $62.1 million in economic impact for Atlanta, a $17 million increase from the previous WrestleMania event, and also generated approximately $7.8 million in local, state and county taxes.

Critically, the event received a mixed reception. Praise went towards the World Heavyweight Championship match, Punk vs. Orton, and Triple H vs. The Undertaker. Criticism went towards the tag matches, the main event, and Lawler vs. Cole, the latter of which has been named one of the worst matches in WrestleMania history.