Joselito's cinematic debut in El pequeño ruiseñor marked his major breakthrough, catapulting him to national and international fame. This film instantly established him as El Niño de la Voz de Oro, a beloved child star across Spain and Latin America.
Following the immense success of his debut, Joselito starred in Saeta del ruiseñor, which solidified his status as a cinematic phenomenon. This film continued his string of box office hits, demonstrating his widespread and enduring appeal.