Kurt Kren was born in 1929 in Vienna, Austria from a Jewish father and a German mother. From 1939 till the end of World War II, Kren lived in Rotterdam, where he was sent to with one of the Children's Transports.

In 1947 Kren returned to Vienna, and his father provided him a job at the National Bank. He began making films in 1957. 2/60 48 Köpfe Aus Dem Szondi -Test (1960) was his first serial film and 3/60 Bäume Im Herbst (1960) confirmed this structural orientation.