In the romantic drama On Chesil Beach, Anne-Marie Duff plays Marjorie Mayhew, the mother of the male protagonist. The film follows the story of a young couple in the early 1960s, exploring themes of love, sexual repression, and societal expectations. Duff's portrayal of Marjorie showcases her versatility as an actress, capturing the complexities of a mother torn between her own desires and her son's happiness.