The Great Waltz

In 1840s Vienna, Johann Strauss I (Nigel Patrick) is conducting an orchestra in a ballroom full of dancers, when he is interrupted by his furious estranged wife, who confronts him about the fact that his notorious mistress is planning to name her new baby son by with the name Johann, the same as Strauss's legitimate son, Johann Strauss II (Horst Buchholz).