Ray Barra (born January 3, 1930) is an American former ballet dancer, a ballet master and ballet director.
 He was a soloist with the American Ballet Theatre and a principal dancer of the Stuttgart Ballet, where he created parts in creations by John Cranko, including Romeo in "Romeo and Juliet" with Marcia Haydée as Julia.
 After retiring from the stage due to an injury, he worked as a ballet master with the Berlin State Ballet, the ballet of the Frankfurt Opera, the Hamburg Ballet and the Spanish National Dance Company.
"Black Swan" is a 2010 American psychological thriller film about a ballet dancer directed by Darren Aronofsky and starring Natalie Portman, Vincent Cassel, and Mila Kunis.
 After the 83rd Academy Awards, in which Portman won the Oscar for Best Actress for her role in the film as a ballerina, controversy arose over how much credit for the dancing in the film was being given to her and how much to her "dance double", American Ballet Theatre soloist Sarah Lane.
Cynthia Harvey (born May 17, 1957) is an American dance teacher and former ballet dancer.
 She was a principal dancer for the American Ballet Theatre.
 Harvey was born in California, and joined American Ballet Theatre in 1974.
 Her roles included Odette/Odile in "Swan Lake".
 While Mikhail Baryshnikov was the artistic director at ABT, she performed as the prima ballerina in Baryshnikov's filmed production of "Don Quixote".
Michele Wiles is an American ballet dancer.
 She was a principal dancer with American Ballet Theatre from 2005 - 2011.
 In 2011, she left ABT to form the independent classical ballet company Ballet Next with former New York City Ballet principal dancer Charles Askegard.
Magali Messac, a European/American ballet dancer, was born and raised in the south of France, where she received her early training from Olga and Henry Taneeff.
 In 1969, the age of seventeen, she joined the Hamburg Ballet, and four years later, was promoted to principal dancer.
 That year, she received the Oberdorfer Culture Award for the most talented young artist.
 In 1978, she came to the United States as a principal dancer for the Pennsylvania Ballet, and in 1980, was invited by Mikhail Baryshnikov to join American Ballet Theatre as one of their principal ballerinas.
 Ms. Messac finished her performing career in Seattle with the Pacific Northwest Ballet.
David Hallberg is American classical ballet dancer.
 He is a principal dancer for American Ballet Theatre and resident guest artist at the Australian Ballet, and formerly a principal dancer with the Bolshoi Ballet.
Polina Alexandrovna Semionova (Russian: Полина Александровна Семионова ; born 13 September 1984) is a Russian ballet dancer who was previously a principal dancer and is currently principal dancer with the American Ballet Theatre in New York and with the Berlin State Ballet.
 She is a professor at the Berlin State Ballet School.
Walter Patrick Bissell (December 1, 1957 – December 29, 1987) was an American danseur.
 He was a leading principal dancer with the American Ballet Theatre.
 On his death at age 30 from a drug overdose, he was described by the artistic director of the American Ballet Theatre Mikhail Baryshnikov as "without a doubt one of the brightest lights in American Ballet Theater's history, or, for that matter, in the entire ballet world".
 Bissell was noted for his height and athleticism.
 His most famous rôle was as Solor in "La Bayadère".
 His death prompted investigations into the alleged widespread drug use within the American Ballet Theatre.
Sarah Lane (born August 3, 1983/1984) is an American ballet dancer and a principal dancer with American Ballet Theatre (ABT).
Hee Seo (; born 13 March 1986) is a South Korean principal dancer for American Ballet Theatre (ABT), one of the three leading classical ballet companies in the United States.
 She became the company's first Korean ballerina to be promoted to principal dancer in ABT's 75-year history and is one of only three principal dancers in the company who have worked their way up the ranks from the American Ballet Theatre Studio Company.
 She is also one of the youngest dancers in ABT history to be promoted to principal at the age of twenty-six. "
The New York Times" has described her style and dancing to "exude an unhurried purity that sums up all that is lovely about ballet" and by "Vogue" as "unspeakably lissome".
 Several critics have noted her style as "lyrical and open" and she has been critically acclaimed for her "humility" and "unique feminine strength".

Question: What American ballet dancer and principal dancer with the American Ballet Theatre, also starred as a "dance double" for Natalie Portman in the 2010 movie Black Swan?
Answer: Sarah Lane