Spencer is a biographical drama film directed by Pablo LarraÃn, with a screenplay by Steven Knight. The film is set over the course of a three-day Christmas holiday in the early 1990s, during which Princess Diana (played by Kristen Stewart) decides to leave her marriage to Prince Charles.
The film explores Diana's struggle with the pressures of her royal duties, her feelings of isolation, and her increasing disillusionment with her marriage. As she spends time with the royal family at the Sandringham estate, she reflects on her past and her future, and comes to the realization that she must leave Charles in order to find happiness and security for herself and her sons.
Throughout the film, Diana is haunted by the specter of Princess Grace Kelly (Sally Hawkins), another beloved and glamorous princess who also struggled with the demands of her royal role. As Diana grapples with her own fears and doubts, she seeks solace in the company of her childhood friend and confidante, Lady Sarah Spencer (Amy Manson), and finds unexpected support from a group of staff members at the Sandringham estate.
As the holiday draws to a close, Diana makes the difficult decision to leave Charles and embark on a new chapter in her life. The film ends with a poignant scene in which Diana, dressed in a simple and elegant black dress, walks alone through the misty grounds of the Sandringham estate, hinting at the uncertain but hopeful future that awaits her.