Mil Máscaras is a Mexican luchador and actor. He is regarded as one of the greatest wrestlers of the lucha libre tradition in Mexico – along with El Santo and Blue Demon – and has been described as the first international superstar of lucha libre. Mil Máscaras is considered one of the most influential wrestlers of all time for enhancing and popularizing the lucha libre style around the world, both in the ring and as the star of 20 films. He is also an accomplished artist and cultural ambassador for his native country and has appeared on three of its postage stamps. Although he has never been unmasked and his true identity is generally kept a secret out of respect for lucha libre traditions, his real name is known due to appearing in the credits of the films he has starred in. His ring name is Spanish for "Thousand Masks".

Lucha libre is the term for the style of professional wrestling originating in Mexico. Since its introduction to Mexico in the early 20th century, it has developed into a unique form of the genre, characterized by colorful masks, rapid sequences of holds and maneuvers, and "high-flying" maneuvers, some of which have been adopted in the United States, Japan, and elsewhere. The wearing of masks has developed special significance, and matches are sometimes contested in which the loser must permanently remove his mask, which is a wager with a high degree of weight attached. Tag team wrestling is especially prevalent in lucha libre, particularly matches with three-member teams, called trios.