Gerhard Höllerich (25 January 1943 – 9 October 1991), known professionally as Roy Black, was a German schlager singer and actor, who appeared in several musical comedies and starred in the 1989 TV series, Ein Schloß am Wörtherseecode: deu promoted to code: de .

Source: Wikipedia (https://en.wikipedia.org/wiki/Roy_Black_(singer))