When the Grapevines Bloom on the Danube (German: An der Donau, wenn der Wein blüht) is a 1965 Austrian-West German comedy film of the heimatfilm genre directed by Géza von Cziffra and starring Hansjörg Felmy, Ingeborg Schöner and Peter Weck. The cinematographer was Heinz Pehlke. It was shot in Eastmancolor and Cinemascope using the Sievering Studios in Vienna and on location around Passau, Linz and the Wachau valley. The film's sets were designed by the art director Hertha Hareiter.
Cast
Hansjörg Felmy as Frank Richter
Ingeborg Schöner as Gabriele Welser
Gaston Brocksieper as Florian Richter
Peter Weck as Dr. Walter Kuntz
Letícia Román as Susi Müller
Elisabeth Markus as Hofrätin Welser
Richard Eybner as Diener Ferdinand
Ottilie Iwald as Frau Beck
Edd Stavjanik as Chauffeur Martin
Hans Habietinek as Tagportier
Fritz Puchstein as Nachtportier