Klaus Detlef Sierck was born on March 30, 1925 in Berlin-Charlottenburg, Germany. He was an actor, known for Kopf hoch, Johannes! (1941), Streit um den Knaben Jo (1937) and Die Saat geht auf (1935). He died on March 6, 1944 in Novoaleksandrovka, Kirovograd Oblast, Ukrainian SSR, USSR [now Novooleksandrivka, Kirovohrad Oblast, Ukraine].