Captain Fantastic is a 2016 American comedy-drama film written and directed by Matt Ross and starring Viggo Mortensen, Frank Langella, Kathryn Hahn, and Steve Zahn. The story centers on a family that is forced by circumstances to reintegrate into society after living in isolation for a decade.

The film had its world premiere at the Sundance Film Festival on January 23, 2016.[4] It was screened in the Un Certain Regard section at the 2016 Cannes Film Festival.[5][6] It was theatrically released on July 8, 2016 by Bleecker Street.[7] It was chosen by the National Board of Review as one of the top ten independent films of 2016[8] and Mortensen was nominated for the Golden Globe, the BAFTA Award,[9] and the Academy Award for Best Actor.[10]

Ben Cash, his wife Leslie and their six children live in the Washington wilderness. Ben and Leslie are former left-wing anarchist activists disillusioned with capitalism and American life, who chose to instill survivalist skills, left-wing politics, and philosophy in their children—educating them to think critically, training them to be self-reliant, physically fit & athletic, guiding them without technology; demonstrating the beauty of coexisting with nature and celebrating Noam Chomsky's birthday instead of Christmas.