Klaus Detlef Sierck was born on March 30, 1925 in Berlin-Charlottenburg, Germany. He was an actor, known for
Serenade (1937),
Kadetten (1939) and
The Immortal Heart (1939). He died on March 6, 1944 in Novoaleksandrovka, Kirovograd Oblast, Ukrainian SSR, USSR [now Novooleksandrivka, Kirovohrad Oblast, Ukraine].