This Happy Feeling

This Happy Feeling is a 1958 film by Blake Edwards adapted from the F. Hugh Herbert play For Love or Money.

Nita Holloway, a woman romantically involved with veteran actor Preston Mitch Mitchell, tries to persuade him to come out of retirement to appear in a Broadway play as the father of a character played by a new teen idol, Tony Manza. At his Connecticut farm, nextdoor neighbor Bill Tremayne asks to borrow Mitchs car. He goes to a party and meets secretary Janet Blake, who is trying to escape the clutches of her drunken boss, a dentist. Bill offers her a ride home in a rainstorm, but is a little too attentive to her liking.Soaked to the skin, Janet ends up knocking on Mitchs door. He permits her to spend the night while her dress dries. Nita arrives in the morning and mistakenly concludes an affair is taking place, and soon others assume the same. Mitch puts her on a train but also offers Janet a job as his own secretary. As the train leaves, he stumbles, injuring his back. ........

Source: Wikipedia