The Madness of King George is a 1994 British biographical historical comedy-drama film directed by Nicholas Hytner and adapted by Alan Bennett from his own play, The Madness of George III. It tells the true story of George III of Great Britain’s deteriorating mental health, and his equally declining relationship with his eldest son, the Prince of Wales, particularly focusing on the period around the Regency Crisis of 1788–89. Modern medicine has suggested that the King’s symptoms were the result of acute intermittent porphyria, although this theory has more recently been vigorously challenged, most notably by a research project based at St George’s, University of London, which concluded that George III did actually suffer from mental illness after all.

The Madness of King George won the BAFTA Awards in 1995 for Outstanding British Film and Best Actor in a Leading Role for Nigel Hawthorne, while also being nominated for the Academy Award for Best Actor. The movie also won the Best Art Direction and was nominated for additional Oscars for Best Supporting Actress for Mirren and Best Adapted Screenplay. Helen Mirren also won the Cannes Film Festival Award for Best Actress and Hytner was nominated for the Palme d’Or.

In 1999, the British Film Institute voted The Madness of King George the 42nd greatest British film of all time.