Question: Which Irish dancing champion originated the principal female role of Riverdance?
Context: Kevin McCormack (born 1970) is a former professional Irish dancer who spent many years as a Dance Captain with "Riverdance".  The Dublin native was part of the original 24 troupe members for "Riverdance's" seven-minute interval act at the 1994 Eurovision Song Contest.  A 10-time World Irish Dance Champion, McCormack holds ADCRG titleship which means he is recognised by An Coimisiún Le Rincí Gaelacha, the governing body of Irish dancing worldwide, as being qualified to adjudicate Irish Step dancing on any competitive level throughout the world. Irish dance or Irish dancing is a group of traditional dance forms originating in Ireland, encompassing dancing both solo and in groups, and dancing for social, competitive and performance purposes.  Irish dance in its current form developed from various influences such as French quadrilles and English country dancing throughout the 18th and 19th centuries.  Dance was taught by "travelling dance masters" across Ireland throughout this period, and separate dance forms developed according to regional practice and differing purposes.  Irish dance became a significant part of Irish culture, particularly for Irish nationalist movements.  From the early 20th century, a number of organisations promoted and codified the various forms of dance, creating competitive structures and standardised styles. Louise Walden (born 19 August 1983 in Preston, England) is a British ice dancer.  With partner Owen Edwards, she is the 2011 British and Welsh ice dancing champion. The Clare Lancers Set is one of the most popular dances in the Irish Set Dancing repertoire.  As the name suggests it hails from the Clare area on the mid-west coast of the Republic of Ireland.  Other published instructions for this dance include Larry Lynch's "Set Dances of Ireland", Terry Moylan's "Irish Dances", Pat Murphy's "Toss the Feathers" and Tom Quinn's "Irish Dancing".  Joe O'Hara and the Newcastle Irish Set Dancers have versions this set online. Bill Whelan, (born 22 May 1950 in Limerick, Ireland) is an Irish composer and musician.  He is best known for composing a piece for the interval of the 1994 Eurovision Song Contest.  The result, "Riverdance", was a seven-minute display of traditional Irish dancing that became a full-length stage production and spawned a worldwide craze for Irish dancing and Celtic music and also won him a Grammy.  It was released as a single in the UK in 1994, credited to "Bill Whelan and Anúna featuring the RTÉ Concert Orchestra".  It reached number 9 and stayed in the charts for 16 weeks.  The album of the same title reached number 31 in the album charts in 1995. 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". Dance Lexie Dance is a short film made in Northern Ireland, and released in 1996.  The two principal characters are a widower, Lexie, and his daughter, Laura, who live in Derry.  Laura becomes keen on Irish stepdance and on joining Riverdance when she grows up.  Traditional Irish dancing is practiced by Catholic families.  Lexie and his daughter are Protestant, but Lexie relents and encourages his daughter.  Self-taught, Laura enters a dance contest across the River Foyle in a Catholic district.  The film ends as Laura teaches her father the first steps of the dance. Bernard Ford, MBE, (born in Birmingham) is an English former ice dancer.  With partner Diane Towler, he is a four-time (1966–1969) World, European, and British champion.  He is also a World Professional ice dancing champion.  He later became a coach and choreographer. Riverdance is a theatrical show consisting mainly of traditional Irish music and dance.  Featuring Irish dancing champions Jean Butler and Michael Flatley, and with a score composed by Bill Whelan, it originated as an interval performance act during the 1994 Eurovision Song Contest.  Shortly afterwards, husband and wife production team John McColgan and Moya Doherty expanded it into a stage show, which opened in Dublin on 9 February 1995.  Since then, the show has visited over 450 venues worldwide and been seen by over 25 million people, making it one of the most successful dance productions in the world. Bobby Fox is an Irish born Australian actor who originated the role of Franki Valli in the Australian production of "Jersey Boys".  He is a former 4 times World Irish Dance Champion and toured with dance productions "Riverdance", "Dancing on Dangerous Ground" (principal understudy), "To Dance on the Moon" (principal dancer) and starred in the revival of Australian musical "Hot Shoe Shuffle" as Spring.  Fox has also had roles in "Ladies in Black", "Blood Brothers", "Mamma Mia! ", "Leader of the Pack", "Dusty – The Original Pop Diva", "We Will Rock You", "Spamalot" and The Production Company’s "Sweet Charity" and "Damn Yankees".
Answer: Jean Butler