The meticulous and charming British archeology professor Patterson, portrayed by Terry-Thomas, consistently deflects the romantic advances of his students, anticipating that an engagement to Helen, played by Celeste Holm, will bring some peace. However, he’s unprepared for her daughter Libby, brought to life by Tuesday Weld, who has run away from boarding school. Unfamiliar with each other, their initial encounter—Libby finding him in the shower—sets off a cascade of misunderstandings. Things don't improve when his young neighbor Mike, portrayed by Richard Beymer, develops an interest in her. Patterson quickly finds himself overwhelmed as increasingly absurd situations unfold, further complicated by a dog named Jessica who decides to chew on his newly acquired dinosaur bone. While initially promising, the film descends into a cycle of predictable and repetitive mishaps that even Terry-Thomas’s considerable talent struggles to revive after about thirty minutes of romantic antics involving hiding under furniture and some light physical comedy. Beymer and Weld seem to be having fun, and Holm's appearances are enjoyable too. It’s an agreeable enough comedy showcasing the contrast between British formality and American freedom, with a touch of French exuberance. You won't likely recall it afterward, but it easily gets through ninety minutes.

Source on TMDB