From Wikipedia, the free encyclopedia. Gerardo de León (September 12, 1913 - July 25, 1981) was a Filipino actor turned film director, who made his acting debut in the 1934 movie Ang Dangal. De León, who was born as Gerardo Ilagan, was a member of the Ilagan clan of Philippine motion pictures, which includes Robert Arevalo, Liberty Ilagan and Ronaldo Valdez, and musical scorer Tito Arévalo. De León was a medical doctor by profession, but his ultimate love for film has won him over. He made eig ...