His appearances in front of the camera diminished in the 30's, he gave his special attention to the stage again.
He gained a foothold in the film business in 1918 with "Kinder der Strasse" (1918), it followed "Eines grossen Mannes Liebe" (1920) and he became a successful silent movie actor in the next years.
His last cinematical works came in the 40's.
The actor Harry Nestor was a busy actor on stage as well as in movies.