The theme song, often referred to as "Morena de Mi Corazón," was written by Robert Rodriguez and performed by Los Lobos featuring Antonio Banderas on lead vocals.

The 1995 film Desperado , directed by Robert Rodriguez , remains a landmark of 90s action cinema, primarily due to its opening sequence featuring performing " Canción del Mariachi ". This scene transcends traditional film scores by integrating the character’s identity with a high-energy musical performance that established the "El Mariachi" legend. The Opening Theme: "Canción del Mariachi"