Una viuda difícil (English: A Difficult Widow) is a 1957 Argentine comedy film directed by Fernando Ayala and written by Conrado Nalé Roxlo, based on his homonymous theatre play. It stars Alba Arnova, Alfredo Alcón and Ricardo Castro Ríos. Music was composed by Ástor Piazzolla and Vassili Lambrinos created the choreography for the black and white film.