Gerwig plays a bright, scattered 27-year-old who's still living as though it's her first year out of college. No matter whether she's sporting genuinely amusing dialogue or making a fool of herself, Gerwig is embraceable, unpredictable and possessed of gifts for physical comedy that can be simultaneously graceful and bumbling. She can behave lamentably and embarrassingly and you can still love her for it. This is probably Gerwig's defining acting performance. The film is a delight!