Immortal Waltz (German: Unsterblicher Walzer) is a 1939 historical drama film directed by E. W. Emo and starring Paul Hörbiger, Dagny Servaes, and Maria Andergast.

[1] The film was made by Wien-Film, a Vienna-based company set up after Austria had been incorporated into Greater Germany following the 1938 Anschluss.

While his sons Johann Strauss II and Josef have inherited their father's talent, he is strictly opposed to them being trained as composers by concertmaster Amon, a good friend of his.

When Johann junior learns of his brother's emotional dilemma, he gives Josef an opportunity to prove his musical skills for the first time at a New Year's Eve celebration.

Josef's premiere is a great success, and he finally commits himself to music and abandons his engineering career.