Margaret Qualley burst onto the scene as one of Charles Manson’s followers in ‘Once Upon a Time in Hollywood’. Here she plays Joanna, assistant to Weaver’s literary agent, whose job it is to process J. D. Salinger’s voluminous fan mail. She soon tires of replying with the stock letter and impulsively begins personalising the responses. In using the great writer’s voice, Joanna begins to discover her own.