Like his character Nick Dreamer in this movie, was it Roy Black's first performance as an actor in a feature film. Until 1973 he played in 13 more movies and the TV series Ein Schloß am Wörthersee (1990).
Gunther Phillip and Peter Weck, two actors from the segment "Gedränge unterm Himmelbett" (Crowd under the canopy bed), set at the White Horse Inn in Salzkammergut, Austria, known for the play and the operetta of the same name, were both starring in actual movie adaptations of the operetta. Gunther Phillip played Sigismund Sülzheimer in the 1960-movie Im weissen Rössl (1960) and Peter Weck played Leopold Brandmeyer in the 1967-adaptation Im weissen Rößl (1967)
Sam Vogel refers that famous sportsmen are singing these days. This actually happened, as during the filming time the football player Gerd Müller was recording a few records, also in the following years.