Lamas was also seen in The Poor People's Christmas (1947), The Tango Returns to Paris (1948), and The Story of a Bad Woman (1948). He had the lead in La rubia Mireya (1949) alongside Mecha Ortiz, and a key role in De padre desconocido (1949), Vidalita (1949) and The Story of the Tango (1950). He also appeared in Corrientes, calle de ensueños (1949), and La otra y yo (1950). He was reportedly the third biggest star in the country. His first American film was The Avengers (1950) for Republic Pictures shot on location in Argentina. Some scenes were filmed in the US, leading to Lamas going to Hollywood.