A Waltz by Strauss or As Long as Strauss Waltzes are Heard (German: So lang' noch ein Walzer vom Strauß erklingt) is a 1931 German historical musical film directed by Conrad Wiene and starring Hans Junkermann, Gustav Fröhlich and Julia Serda.

The film's sets were designed by the art director Willy Schiller.

In the United Kingdom it was released as Johann Strauss.

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