Question: Jean Marsh plays the role of a princess in what movie?

Context paragraphs:
Jean Marsh: Jean Lyndsey Torren Marsh, {'1': ", '2': ", '3': ", '4': "} (born 1 July 1934) is an English actress and writer.  Marsh co-created and starred in the ITV series "Upstairs, Downstairs" (1971–75), for which she won the 1975 Emmy Award for Outstanding Lead Actress in a Drama Series for her performance as Rose Buck.  She later reprised the role in the BBC's revival of the series (2010–12).  Marsh also co-created the television series "The House of Eliott" in 1991.  Her film appearances include "Cleopatra" (1963), "Frenzy" (1972), "The Changeling" (1980), "Return to Oz" (1985), "Willow" (1988) and "Monarch" (2000).

Princess Peach: Princess Peach (Japanese: ピーチ姫 , Hepburn: Pīchi-hime ) is a character in Nintendo's "Mario" franchise.  Originally created by Shigeru Miyamoto, Peach is the princess of the fictional Mushroom Kingdom, which is constantly under attack by Bowser.  She often plays the damsel in distress role within the series and is the lead female.  She is often portrayed as Mario's love interest and has appeared in "Super Princess Peach", where she is the main playable character.

Willow (film): Willow is a 1988 British-American high fantasy film directed by Ron Howard, produced and with a story by George Lucas, and starring Warwick Davis, Val Kilmer, Joanne Whalley, Jean Marsh, and Billy Barty.  Davis plays the eponymous lead character and hero: a reluctant farmer who plays a critical role in protecting a special baby from a tyrannical queen who vows to destroy her and take over the world in a high fantasy setting.

Caitlin Stasey: Caitlin Jean Stasey (born 1 May 1990) is an Australian actress.  She is known for her role as Rachel Kinski in "Neighbours".  Previously she played Francesca Thomas in "The Sleepover Club", although her breakthrough movie role came in "Tomorrow, When the War Began", a 2010 movie adaption of the teen novel of the same name in which she played lead protagonist Ellie Linton.  She also played Lady Kenna in the American series "Reign" from 2013 to 2015 and had a recurring role in the ABC2 series "Please Like Me" from 2013 to 2016.  In 2017 Stasey starred as Ada on the Fox television drama "APB", which was cancelled after one season in May 2017.

Return to Oz: Return to Oz is a 1985 fantasy adventure film directed and written by Walter Murch, an editor and sound designer, co-written by Gill Dennis and produced by Paul Maslansky.  It stars Nicol Williamson as the Nome King, Jean Marsh as Princess Mombi, Piper Laurie as Aunt Em, Matt Clark as Uncle Henry and introduces Fairuza Balk as Dorothy Gale.  It is loosely based on L. Frank Baum's "Oz" novels, mainly "The Marvelous Land of Oz" (1904) and "Ozma of Oz" (1907), yet is set six months after the events of the first novel, "The Wonderful Wizard of Oz" (1900) took place.  Although it is not a sequel and unrelated to the 1939 Metro-Goldwyn-Mayer film, "The Wizard of Oz", it borrows a few elements of it such as the ruby slippers.

The House of Eliott: The House of Eliott is a British television series produced and broadcast by the BBC in three series between 1991 and 1994.  The series starred Stella Gonet as Beatrice Eliott and Louise Lombard as Evangeline Eliott, two sisters in 1920s London who establish a dressmaking business and eventually their own haute couture fashion house, and Aden Gillett as photographer and film maker Jack Maddox.  It was created by Jean Marsh and Eileen Atkins, who had previously devised "Upstairs, Downstairs".  The series was written by several writers including Jill Hyem, Peter Buckman, Deborah Cook and Ginnie Hole.

Sara Kingdom: Sara Kingdom is a fictional character played by Jean Marsh in the long-running British science fiction television series "Doctor Who".  A security officer for Mavic Chen from the 40th century, she later joined the First Doctor and Steven to work against Chen's interests.  She is sometimes classed as a companion of the First Doctor but the BBC's official "Doctor Who" website does not include her in their list of companions.  Her status as a companion is commented upon in its Episode Guide.

Steve Marsh (comedian): Stephen "Steve" Marsh (born 1978) is a British actor and former co-host of the CBeebies programme "Big Cook, Little Cook", and was also co-host of "Space Hoppers".  Marsh plays the part of the big cook, Ben.  He and his "Big Cook, Little Cook" co-host Dan Wright form a comedy duo under the name of "Electric Forecast".  He also appeared in Wright's documentary "F*** Off, I'm Ginger" and as himself in Sky 1's "Crash Test Dummies" during 2007.

Gaayathri: Gaayathri is a Tamil film is directed by R.Pattabhiraman.  It has Rajinikanth and Sridevi in the lead roles.  Once again Rajini plays a cruel husband of Sridevi.  Jaishankar plays a guest role in this movie.  Singer Sujatha Mohan made her debut as a singer through this film at the age of 12.  The movie was based on the story "Gayathri" written by Sujatha Rangarajan.  According to Panchu Arunachalam, this was the movie that turned Rajini's fortunes as seeing the audience's favorable response to Rajini (Villain) over Jaishankar (hero), he decided to cast him in a positive role in Bhuvana oru kelvikuri.

Sara Botsford: Sara Botsford (born August 4, 1951) is a Canadian television and film actress.  She plays Marilla in the 2016 "Anne of Green Gables" TV movie, opposite Martin Sheen, and plays Lady Covington in the Nickelodeon YTV series "RIDE".  She is probably best known for her role of Ann Hildebrand in the television series "E.N.G." for which she won a Gemini Award for Best Performance by an Actress in a Continuing Leading Dramatic Role.  Prior to that role, her most remembered role would be the wickedly evil character of Lillith McKechnie, AKA Isabella, on the daytime drama "As the World Turns" from 1988 to 1990.  In "Dangerous Offender: The Marlene Moore Story" (1996), she portrayed Marlene Moore's (Brooke Johnson) lawyer.  In 2002 she portrayed Kathleen Sinclair in the TV movie "Trudeau" about the life of the late Prime Minister Pierre Elliott Trudeau.  In 2003 she appeared in "Burn: The Robert Wraight Story".

Supporting paragraphs: Jean Marsh Return to Oz
Answer: Return to Oz