Question: What nationality is the actress who played George Sand in the 1991 film Impromptu ?

Context paragraphs:
Valentine (novel): Valentine (1832) was a novel published by French author George Sand.  This was the second novel published in Sand's career as an independent author, the novel is notable for displaying many of Sand's preoccupations as an emerging novelist: love, social class, greed, liberty, and family ties.  Like many of Sand's novels, the novel takes its name from its title character Valentine, who is born into an aristocratic family but falls in love with the peasant farmer, Benedict.  Star-crossed lovers belonging to different social classes were to become a major theme in Sand's works, which interrogated what the author perceived as the hypocrisy and rigidity of social norms in the Restoration-period French republic.

Impromptu (1991 film): Impromptu is a 1991 British-American period drama film directed by James Lapine, written by Sarah Kernochan, produced by Daniel A. Sherkow and Stuart Oken, and starring Hugh Grant as Frédéric Chopin and Judy Davis as George Sand.  The film was shot entirely on location in France as a British production by an American company.  The main location used was at the Chateau des Briottières outside of Angers, in the Loire Valley.

Consuelo (novel): Consuelo is a novel by George Sand, first published serially in 1842-1843 in "La Revue indépendante", a periodical founded in 1841 by Sand, Pierre Leroux and Louis Viardot.  According to "The Nuttall Encyclopædia", it is "[Sand's] masterpiece; the impersonation of the triumph of moral purity over manifold temptations."

House of George Sand: The House of French writer George Sand (1804–1876) is a writer's house museum in the village of Nohant, in the Indre Department of France.  It was purchased by the French state in 1952, and preserved because it was where George Sand wrote many of her books and hosted many of the most important artists and writers of her time, including Frédéric Chopin, Balzac, Turgenev, and Delacroix.  The writer and her family are buried in a small cemetery between the garden and the village church.  The gardens are classified by the French Ministry of Culture as among the Notable Gardens of France.  The house is open to the public, and is managed by the "Centre des monuments nationaux".

Maurice Sand: Jean-François-Maurice-Arnauld, Baron Dudevant, better known as Maurice Sand (June 30, 1823 in Paris – September 4, 1889 in Nohant-Vic), was a French illustrator and writer.  Maurice Sand also experimented in various other subjects, including painting, geology, and biology.  He was the son of Baron Casimir Dudevant and his wife, French novelist and feminist George Sand.

Judy Davis: Judith "Judy" Davis (born 23 April 1955) is an Australian actress.  With a career spanning over 40 years she is commended for her versatility and is regarded as one of the finest actresses of her generation with Woody Allen describing her as "one of the most exciting actresses in the world".  She is the recipient of eight AACTA Awards, three Emmy Awards, two BAFTA Awards, two Golden Globe Awards and has twice been nominated for an Academy Award.

La Petite Fadette: La Petite Fadette, also published in English under the title Fanchon, the Cricket, is an 1849 novel by French novelist George Sand, née Amantine Dupin.  Sand wrote the rural story together with "Francois le Champi" in the 1840s as she left behind her life as a glamorous writer in Paris to return to the countryside of Châteauroux.  The novel is one of Sand's best known today.  It was translated into English and published in 1900 by Henry Holt and Company.  A 2004 French television movie was directed by Michaëla Watteaux.

Hortense Allart: Hortense Allart de Méritens (] ; pseudonym Prudence de Saman L'Esbatx; September 7, 1801 – 28 February 1879) was an Italian-French feminist writer and essayist.  Her novels, based on her adventures, did not have much success, except for "Les enchantements de Prudence, Avec George Sand" ("The Enchantment of Prudence, with George Sand") (1873), which had a "succès de scandale".

Revue indépendante: Revue indépendante is a French symbolist journal.  The journal was founded in 1841 by George Sand, Pierre Leroux, and Louis Viardot, and is notable for having published such novels as "Les Lauriers sont coupés" by Édouard Dujardin, "En rade" by Joris-Karl Huysmans, and "Consuelo" by George Sand.  The magazine is based in Paris.  In 1947 it became the official magazine of the Union of Journalists and Writers.  Its editor-in-chief is Christian Grégoire.  In March 2014 it went on online.

Portrait of Frédéric Chopin and George Sand: The Portrait of Frédéric Chopin and George Sand was an 1838 unfinished oil-on-canvas painting by French artist Eugène Delacroix.  Originally a double portrait, it was later cut in two and sold off as separate pieces.  It showed composer Frédéric Chopin (1810–49) playing piano while writer George Sand (1804–76) sits to his right, listening and smoking a cigar (a favorite activity of hers).  The sitters were lovers at the time, and both were close friends of the artist.

Supporting paragraphs: Impromptu (1991 film) Judy Davis
Answer: Australian