Original Australian Daybill movie poster.The Mosquito Coast is a 1986 American drama film directed by Peter Weir and starring Harrison Ford, Helen Mirren, Andre Gregory, and River Phoenix. It is based on the novel of the same name by Paul Theroux. The film tells the story of a family that leaves the United States and tries to find a happier and simpler life in the jungles of Central America. However, their jungle paradise quickly turns into a dystopia as their stubborn father's behavior becomes increasingly erratic and aggressive. It was shot in the cities of Cartersville and Rome in Georgia, in addition to Baltimore, Maryland, and Belize.