Heinz Rühmann as Dr. Felix Schneider

Hans Moser as Professor Karl Stieglitz

Theo Lingen as Paul Fellmeier

Nadja Tiller as Olga Fellmeier

Annie Rosar as Lilli Schneiders Mutter

Gusti Wolf as Hilde

Chariklia Baxevanos as Hertha Nepalek

Hilde Berndt as Lilli Schneider

Brigitte Ratz as Brigitte Schneider

Lotte Lang as Marie (Dienstmädchen)

Margarete Slezak as Rosi Stieglitz

Egon von Jordan as Dr. Haberer

Fritz Heller as Herr Kraus