As a young actor he received a big build-up when cast as Benito Juárez
in
El joven Juárez (1954) -- immediately after appearing in Luis Buñuel's _Río y la muerte, El (1954)_.
He'd actually been a stage and screen actor for several years; under
the name
Juan Pérez, Almazán worked in European films directed by Roberto
Rossellini and Jean Renoir, among others. However, these auspicious
beginnings didn't do much for his career, and Almazán eventually became
a priest in the 1960s.