The Lion in Winter is a 1968 British historical drama centred on Henry II of England and his attempt to establish a line of succession during a family gathering at Christmas 1183. His efforts unleash both political and personal turmoil among his estranged wife Eleanor of Aquitaine, their three surviving sons, the French king, and the king's half-sister Alais, who is Henry's mistress. The film stars Peter O'Toole and Katharine Hepburn, was directed by Anthony Harvey, written by James Goldman, and produced by Joseph E. Levine, Jane C. Nusbaum, and Martin Poll. Actors John Castle, Anthony Hopkins (in his first major film role), Jane Merrow, Timothy Dalton (in his film debut) and Nigel Terry appear in support.

Based on Goldman's play The Lion in Winter, the film was a critical and commercial success, winning three Academy Awards (including Hepburn's win for Best Actress, making her the first three-time winner in the category). A television remake of the film was released in 2003.