WrestleMania III was the third annual WrestleMania professional wrestling pay-per-view event produced by the World Wrestling Federation (WWF). The event was held on March 29, 1987 at the Pontiac Silverdome in Pontiac, Michigan.

The event is particularly notable for the record attendance of 93,173, the largest recorded attendance for a live indoor sporting event in North America. Though differing numbers have been argued, the event is considered to be the pinnacle of the 1980s wrestling boom. The record itself stood until February 14, 2010 when the 2010 NBA All-Star Game broke the indoor sporting event record with an attendance of 108,713 at Cowboys Stadium. The WWF generated $1.6 million in ticket sales. Almost one million fans watched the event at 160 closed circuit locations in North America. The number of people watching via pay-per-view was estimated at several million, and pay-per-view revenues were estimated at $10 million.

Like all other WrestleMania events, WrestleMania III was hyped for several months in advance. The main feud stemmed from André the Giant's kayfabe turn and betrayal of his ally, the WWF Champion Hulk Hogan, which began when Hogan was presented a trophy for being the WWF Champion for three years, and André, his good friend, came out to congratulate him. Shortly afterwards, André was presented a slightly smaller trophy for being "undefeated in the WWF for 15 years" and Hogan came out to congratulate André, but ended up being the focal point of the interview. Annoyed by this, André walked out during Hogan's congratulation speech and not long after that, on an edition of the interview segment Piper's Pit, Bobby Heenan, a long-time Hogan adversary, announced himself to be André's new manager. André then challenged Hogan to a title match at WrestleMania III and attacked Hogan, ripping off Hogan's T-shirt and crucifix necklace.