The film focuses on one weekend in the life of the late princess, as she spends the Christmas 1991 holiday with the royal family at the Sandringham estate in Norfolk, and decides to end her marriage to Prince Charles.
Stewart stars as Diana, alongside a supporting cast including Jack Farthing as Charles, Timothy Spall, Sally Hawkins and Sean Harris.
Larrain directs from a screenplay by Steven Knight; the producers are Juan de Dios Larraín for Fabula Films, Jonas Dornbach and Janine Jackowski for Komplizen Film and Paul Webster for Shoebox Films.
The department heads on board include DoP Claire Mathon; costume designer Jacqueline Durran; make-up and hair designer Wakana Yoshihara and production designer Guy Hendrix Dyas. Radiohead’s Jonny Greenwood ha composed the original score.
Executive producers are Tom Quinn, Jeff Deutchman and Christina Zisa for NEON and Michael Bloom, Maria Zuckerman and Ryan Heller for Topic Studios.
Spencer is supported by the German Federal Film Fund (DFFF), medienboard Berlin-Brandenburg, German Federal Film Board (FFA), Film- und Medienstiftung NRW and HessenFilm und Medien.