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 is considered a legend of lucha libre, partially from starring in a series of Lucha films between 1961 and 1979, often alongside in-ring rival El Santo. His in-ring career began in 1948 and stretched for 41 years until his retirement in 1989.