Fans of the Greta Gerwig adaptation of Little Women (in New Zealand cinemas now), can't stop talking about Marmee March's confession to her headstrong daughter Jo that "I'm angry nearly every day of my life." It's a line that had never been spoken on film, and only once in a television mini-series, and is one of the things Laura Dern, who plays Marmee in Gerwig's adaptation, tells The New York Times she is happiest about.