On Chesil Beach is a romantic drama film based on the novel by Ian McEwan. Anne-Marie Duff plays Marjorie Mayhew, the mother of the male protagonist. The film follows the story of a young couple, Florence and Edward, who struggle with intimacy and communication on their honeymoon. Duff's portrayal of Marjorie brings depth to the supporting character, adding emotional weight to the narrative. On Chesil Beach is a poignant film that explores themes of love, desire, and societal expectations.