The Impossible Years is a 1968 American comedy film directed by Michael Gordon, and starring David Niven.

The elder, Linda, 17, begins to display uncharacteristic behavior: walking as if on air, smiling incessantly for no reason, cleaning up her room daily, showing politeness toward her little sister, and more.

It is suspected that she has lost her virginity while on a school field trip to Catalina Island, and Kingsley's general practitioner confirms this.

[8] The film was a box-office hit, earning $5.8 million in rentals in North America,[1] making it the 17th most popular movie at the U.S. box office in 1969.

[11] In 1970, it was reported that Jackie Cooper and Bob Finkel had written a pilot script for a TV adaptation of the play for NBC.