Eversmile, New Jersey (Spanish: Eterna sonrisa de New Jersey) is a 1989 Argentine-British comedy-drama film directed by Carlos Sorín and starring Daniel Day-Lewis, Mirjana Joković and Gabriela Acher.

Fergus O'Connell, an itinerant Irish American dentist from New Jersey, offers his services free-of-charge to the isolated rural population of Patagonia, in Argentina.

While his motorbike is being repaired, O'Connell meets Estela, the garage-owner's daughter, and they quickly become affectionate towards each other.

After a series of surrealistic adventures, O'Connell discovers that there's a subliminal price tag attached to his altruistic free services.

Nevertheless, Fergus decides to continue with his work on the prevention of tooth decay and dental health education, simultaneously freeing himself from any kind of sponsorship and corporate meddling.