De León made his first movie after
World War II. The movie is
Orasang Ginto aka Golden Clock under
LVN Pictures where he stayed in the said company for almost 3 decades. De León was the first actor to win the
FAMAS Best Supporting Actor trophy for
Korea. In 1955, he was nominated FAMAS Best Supporting Actor for
Sanda Wong. De León's directorial debut was in
Glory at Dawn (1958) under PMP Pictures. He made two movies under MC Production such as
Juan Tamad with
Manuel Conde and Vende Cristo. He played as a
villain and other supporting roles in most of his films. He continued acting up to the 1980s. ==Personal life==