Alberto Sordi (Alberto Menichetti)Franca Valeri (Vedova De Ritis)Giovanna Ralli (Marcella)Tina Pica (Clotilde)Mario Carotenuto (Gustavo Pedocchi)Leopoldo Trieste (Aurelio Bilancia)Alberto Lattuada (Il direttore)Bud Spencer (Fernando)Pina Bottin (Secretary)Lina Bonivento (Aunt Giovanna)Mino Doro (Prof. Bracci)Giulio Calì (Il giovanottaccio)Paolo Ferrara (Police Commissioner)Jone Frigerio (The old Lady on the Train)Giorgio Berti (Warehouseman)Ciccio Barbi (Employee)Mario Meniconi (Man near Tevere river)Nino Vingelli (Brigadiere)
Alberto Menichetti lives with an aunt and an old housekeeper, Clotilde; he has a job in a firm and his boss is Mrs. De Ritis, a widow whose husband was killed during a wild boar hunt. She likes him but Alberto likes Marcella; she is under age and he is awaiting her birthday to declare his love. His greater traits are to be fearful of everything and to be selfish. This nature will get him into trouble.