Question: Cara Butler is the younger sister of an American stepdancer who is best known for originating the principal female role in what production?

Context paragraphs:
A Cruel Romance: A Cruel Romance (Russian: Жестокий романс ) is a 1984 Russian drama film directed by Eldar Ryazanov.  It is the second adaptation after Protazanov's and is the best known screen version of Alexander Ostrovsky's classic play "Without a Dowry" (1878).  The main female role was played by Larisa Guzeyeva, for whom this was a cinematic debut.

Gold and Glitter: Gold and Glitter is a 1912 American drama film directed by D. W. Griffith and Frank Powell.  Lillian Gish's role as the principal female was praised for its variety of emotion, in comparison to her previous roles.

Cara Butler: Cara Butler is an American stepdancer and choreographer.  She is the younger sister of dancer Jean Butler.

Huaguxi: Huaguxi (花鼓戏 ) is a form of Chinese opera originating in Hunan province.  It is known in China for its earthy quality, and is often referred to as the "spicy" form of Chinese opera.  Huaguxi is known to have existed as early as 1695, during the Qing Dynasty.  Unlike other forms of Chinese opera, Huaguxi originally had only two roles.  These including the "xiao chou ", a small male clown, and the "xiao dan ", a vivacious young girl.  The female role was played by men until women entered Chinese opera in the early 20th century.  In the mid-18th century, a "xiao shen " role was added.  This role refers to handsome young males.

Cara DeLizia: Cara Elizabeth DeLizia (born April 10, 1984) is an American former actress and voice actress.  She is best known for her role as Fi Phillips in "So Weird".  She is the younger sister of .  Cara is the youngest daughter of James DeLizia and Sherry DeLizia.

Sarah Dumont: Sarah Dumont is an American actress and model, best known for playing the lead female role in the film "Scouts Guide to the Zombie Apocalypse".  She also appeared in the film "Don Jon" and series "The Royals".

Amna Ilyas: Amna Ilyas is a Pakistani actress and model.  She is the sister of model Uzma Ilyas.  She is known for her leading roles in the critically and commercially successful films, "Zinda Bhaag" (2013) and "Good Morning Karachi" (2014).  In addition to these, she has also appeared in a lead female role in the Hum TV's television drama "Tum Mere Paas Raho" (2015).

Butler family (Artemis Fowl): The Butler family is a family of martial arts masters in the fictional series Artemis Fowl by Eoin Colfer.  There are only four characters who are mentioned: Domovoi Butler ("Butler") and his younger sister Juliet, who are major characters, and Butler's uncle, known only as "the Major", and Virgil Butler.

Jean Butler: Jean Butler (born March 14, 1971), is an American stepdancer, choreographer, and actress.  She is best known for originating the principal female role in the Irish dance theatrical production "Riverdance".

Camilla (1994 film): Camilla is a 1994 film directed by Deepa Mehta.  It was Jessica Tandy's penultimate film appearance and is dedicated to her memory.  Tandy plays the title character, Camilla Cara, a former concert violinist.  It is a road movie with Bridget Fonda playing the opposite, younger female role of Freda Lopez, herself a musician/composer, albeit unfulfilled.  The two leave their male companions, Camilla's son Harold (Maury Chaykin), a B-movie producer and Vincent (Elias Koteas), Freda's husband and artist behind in Savannah, Georgia to return to Toronto to attend a concert of Brahms' Violin Concerto at the Winter Garden Theatre.  This performance is a mirror of a performance of Camilla's given at the same venue many years earlier.

Supporting paragraphs: Cara Butler Jean Butler
Answer: Riverdance