In 1946, when she starred in a major theatre role, the newspapers carried the headline "Una morena asoma en el teatro porteño", translated as "A black women peeks out in Buenos Aires theatre".
Montero starred in several films in what is considered to be Argentine cinema's golden age, starring alongside important stars like George Rigaud, Silvana Roth, Olga Zubarry, José Ruzzo, Guillermo Battaglia, Alberto Barcel, Enrique Chaico, Pablo Cumo, Enrique Muiño, Amalia Sánchez Ariño, and Margarita Tops [REF].