**Bruno S.** (born Bruno Schleinstein, 1932-2010) was a German non-professional actor, musician, and artist, who became famous through his collaboration with director Werner Herzog.

Discovered by Herzog for his unique authenticity and difficult life experiences, Bruno S. is primarily known for his starring roles in two iconic films. He portrayed the mysterious Kaspar Hauser in **The Enigma of Kaspar Hauser** (1974), a role that leveraged his innate naivety and vulnerability. Subsequently, he delivered an even rawer performance in **Stroszek** (1977), where his character was deeply inspired by his own existence as an outsider and dreamer.

His typical roles were those of marginalized, maladjusted, or misunderstood individuals. His acting was not based on technique, but on a raw authenticity and an almost documentary-like naturalism, which allowed him to convey deep emotions without artifice, making him a unique and unforgettable cinematic presence.