On Chesil Beach is a romantic drama film based on the novel of the same name by Ian McEwan. Anne-Marie Duff plays Marjorie Mayhew, the mother of the male protagonist, Edward Mayhew. The film follows the story of Edward and Florence, a young couple who face challenges on their wedding night due to their differing attitudes towards intimacy. Anne-Marie Duff's portrayal of Marjorie adds depth to the narrative, providing insight into the family dynamics and the impact they have on Edward's life. On Chesil Beach explores themes of love, communication, and societal expectations in a poignant and thought-provoking manner.