Alejandro Muñoz Moreno (April 24, 1922 – December 16, 2000), better known by the ring name Blue Demon (Demonio Azul in Spanish), was a Mexican film actor and luchador enmascarado (Spanish for masked professional wrestler). Blue Demon was one of the original "big three" of the lucha libre tradition in Mexico (the other two being El Santo and Mil Máscaras). He was affectionately referred to as "Blue" and was known for his signature blue wrestling mask.
Alejandro Muñoz Moreno was born April 24, 1922 in García, Nuevo León, Mexico. He was the child of farmers and was the fifth of twelve children. At a young age, Alejandro dropped out of school and moved to Monterrey, where his uncle gave him a job working on the National Railroad. His co-workers gave him the nickname 'Manotas', referring to his large, powerful hands.
A chance meeting with the famous Mexican wrestler Rolando Vera piqued his interest in Lucha Libre, Vera even offering to tutor him and help him start a career. He began wrestling without a mask in Laredo, Texas. His first match was against Chema Lopez on March 12, 1948, which he won handily. Adopting the mask and persona of The Blue Demon, he headed back to Mexico to start a real career. His first appearance as The Blue Demon was in Mexico City in September 1948, where he fought Benny Arcilla. Blue began his career in the ring as a rudo (a bad guy). From there, he formed a famous tag-team with another well-known masked luchador named The Black Shadow (whose real name was Alejandro Cruz), and the two became known as Los Hermanos Shadow (The Shadow Brothers). Years later, some reference sources accidentally listed Blue Demon's real name as Alejandro Cruz, but that was actually the Black Shadow's name (Blue Demon's name was Alejandro Muñoz Moreno).