Fisk met his wife, Spacek, when working on Terrence Malick's 1973 movie Badlands, in which she portrayed the aloof and distant version of Caril Ann Fugate. The couple married on April 12, 1974. They have two daughters, Schuyler Fisk (born 1982), also an Actress, and Madison Fisk (born 1988), a Painter.