Actor, cabaret performer, composer and writer, on stage in variety from 1898 in Berlin.
A Jew, he was able to survive the National Socialist era by hiding out with friends in Berlin.
Willy Prager also remained active as an actor in the sound film era and he impersonated support roles in the productions "Das Kabinett des Dr. Larifari" (1930), or "Liebling der Götter" (1930).
His artistic career was interrupted by the rise of the National Sozialism and the Jew Willy Prager was no longer allowed to work. He went into hiding and was only able to continue his career after the war.
Besides his activity as an actor and screenwriter he also wrote the libretti for "Liebe im Schnee" composed by Ralph Benatzky, "Die Prinzessin vom Nil" and "Die kleine Sünderin".