Received the Hans-Reinhart-Ring, the highest Swiss award for a stage actor. [1962].
His father was a laboratory chemist.
Appeared in more 'Heimatfilms' than just about any other screen actor in the German-speaking cinema.
Studied acting under Josef Danegger. On stage in Zurich from 1918, including singing roles in opera and operetta.
The Swiss actor Heinrich Gretler belongs to the most important film workers of the Swiss film and launched his career with engagements at the Pfauenbühne in 1919.