Michael Greyeyes and Jessica Chastain in Woman Walks Ahead. Courtesy BBG Woman Walks Ahead / A24
Michael Greyeyes as Sitting Bull and Jessica Chastain as New York artist Catherine Weldon, who travels alone to North Dakota to paint him Richard Foreman Jr Courtesy BBG Woman Walks Ahead / A24

Jessica Chastain on how her new film 'Woman Walks Ahead' is changing America's favourite movie genre