Lucha Underground was an American professional wrestling promotion founded in 2014 by United Artists Media Group. Partly owned by Lucha Libre AAA Worldwide (AAA), Lucha Underground also refers to its weekly television program, which featured characters portrayed by wrestlers from AAA and the American and Mexican independent circuits. The series originally aired in English on El Rey Network and in Spanish on UniMás.

The series was developed by Mark Burnett and Robert Rodriguez and produced by United Artists, MGM Television, and One Three Media. It premiered on October 29, 2014 and aired until November 7, 2018, consisting of four seasons for a total of 127 episodes. It was set and filmed in Boyle Heights and Downtown Los Angeles, California, while the series later forged creative and production partnerships with other North American promotions.

Lucha Underground received generally positive reviews throughout its run, with praise for its action, characters, and cinematic presentation, with critics noting its in-universe style and departure from depicting professional wrestling as a legitimate sporting contest. The series had moderate viewership in its first two seasons, but the third and fourth season saw fluctuations in viewership after it was made available on Netflix prior to the fourth season premiere. The series was eventually cancelled due to budget concerns.