Sirk was born Hans Detlef Sierck on 26 April 1897, in Hamburg, of Danish parentage; his father was a newspaper reporter. He spent a few years in Denmark as a child, before his parents returned to Germany and became citizens. Sirk discovered the theatre in his mid-teens, particularly Shakespeare's history plays, and also began to frequent the cinema, where he first encountered what he later described as "dramas of swollen emotions"; one of his early screen favourites was Danish-born actress Asta Nielsen. In 1919, he enrolled to study law at Munich University, but he left Munich following the violent collapse of a short-lived Bavarian Soviet Republic. Between stints at university, he began writing for his father's newspaper, not long before his father became a school principal.