Question: Which Days of Glory star had their ballet debut at age 10 in the Paris Opera?

Context articles: Paris Opera Ballet
Jean-Louis Aumer
Palais Garnier
Attilio Labis
Paris Opera
Flemming Flindt
Ghislaine Thesmar
Days of Glory (1944 film)
François Alu
Tamara Toumanova

The Paris Opera Ballet (French: "Ballet de l'Opéra national de Paris") is an integral part of the Paris Opera and the oldest national ballet company.
 Together with the Moscow Bolshoi Ballet and the London Royal Ballet it is regarded as one of the three most preeminent ballet companies in the world.
Jean-Louis Aumer was a French danseur and choreographer, who was born in Strasbourg on 21 April 1774, and who died in Saint-Martin-de-Boscherville in July 1833.
 Educated at the school of the Paris Opera Ballet, he joined the company in 1801 after an initial engagement with Jean Dauberval in Bordeaux.
 The Paris Opera's "maître de ballet" Pierre Gardel presented an obstacle which led Aumer to choose the Théâtre de la Porte Saint-Martin as the venue for which to create his early ballets.
 Faced with the implacable competition from Gardel, Aumer left France for engagements in Kassel (1808–1814) and Vienna (1814–1820).
 Brief periods in Paris (1821–1822) and London (1824–1825) were followed by his return to the Paris Opera Ballet (1820–1831), where, enriched by the experience of working abroad, he engaged in a profound renovation of the French repertory, capped by his "chef-d'œuvre", "Manon Lescaut" (1830).
The Palais Garnier (] French    ) is a 1,979-seat opera house, which was built from 1861 to 1875 for the Paris Opera.
 It was called the Salle des Capucines, because of its location on the Boulevard des Capucines in the 9th arrondissement of Paris, but soon became known as the Palais Garnier, in recognition of its opulence and its architect, Charles Garnier.
 The theatre is also often referred to as the Opéra Garnier (French    ) and historically was known as the Opéra de Paris or simply the Opéra, as it was the primary home of the Paris Opera and its associated Paris Opera Ballet until 1989, when the Opéra Bastille opened at the Place de la Bastille.
 The Paris Opera now mainly uses the Palais Garnier for ballet.
Attilio Labis (born 1936) is a French ballet dancer and teacher.
 He began his training at the Opéra de Paris when he was nine years old and rose through the ranks of the school.
 In 1952 he was accepted into the corps de ballet Paris Opera Ballet, but in 1958 he had to join the military.
 Upon the completion his military service, he came back and successfully auditioned for a "Premier Danseur" (First soloist) position after only one week of training.
 He was promoted to "Danseur Étoile" (principal dancer) approximately one year later, after André Malraux saw him dance "Pas de Dieux", a choreography by Gene Kelly, and recommended he be promoted.
 He performed as a "Danseur Étoile" (principal dancer) in the Paris Opera Ballet from 1960 to 1972, then taught the company as a ballet teacher until his retirement<br>
The Paris Opera (French: "Opéra de Paris" ;    ) is the primary opera company of France.
 It was founded in 1669 by Louis XIV as the Académie d'Opéra , and shortly thereafter was placed under the leadership of Jean-Baptiste Lully and officially renamed the Académie Royale de Musique , but continued to be known more simply as the Opéra .
 Classical ballet as we know it today arose within the Paris Opera as the Paris Opera Ballet and has remained an integral and important part of the company.
 Currently called the Opéra National de Paris , it mainly produces operas at its modern 2700-seat theatre Opéra Bastille which opened in 1989, and ballets and some classical operas at the older 1970-seat Palais Garnier which opened in 1875.
 Small scale and contemporary works are also staged in the 500-seat Amphitheatre under the Opéra Bastille.
Flemming Flindt (30 June 1936 – 3 March 2009) was a Danish choreographer born in Copenhagen.
 He studied at the Royal Danish Ballet and Paris Opera Ballet schools, joined the Royal Danish Ballet and was promoted to soloist in 1955.
 He guested with the London Festival Ballet in 1955, the Ballet Rambert in 1960, the Royal Ballet 1963 and the Bolshoi Ballet in 1968, becoming an "étoile" at the Paris Opera Ballet in 1961.
Ghislaine Thesmar (born 1943 in Beijing, China), a Ballerina, who studied at the Paris Conservatoire.
 In 1968, she married the dancer and choreographer Pierre Lacotte.
 Companies she danced with include Ballet du Marquis de Cuevas (1961), Lacotte's company, then the Paris Opera Ballet from 1972 to 1985; unusually, she joined the company directly as an "étoile" (principal).
 She led the Ballets de Monte Carlo with Lacotte from 1986 to 1988.
 She danced as a guest for the Rambert Ballet, the Grands Ballets Canadiens and the New York City Ballet.
 She has taught for the Paris Opera Ballet.
 She was frequently partnered by Michael Denard.
 Her most celebrated roles include Odette/Odile in "Swan Lake" and Giselle in "Giselle".
 The ballet film "La Sylphide" (1972) has been released twice on DVD/video and features Thesmar and Denard in the principal roles of the Sylph and the Scotsman, James.
Days of Glory is a 1944 American film which tells the story of a group of Soviet guerrillas fighting back during the 1941 Nazi invasion of Russia.
 It starred Tamara Toumanova and Gregory Peck (in their feature film debuts).
 It was also the first film produced by screen writer Casey Robinson, who in early January 1943 had been contracted by RKO Radio Pictures to write and produce the film under the working title "This Is Russia".
 Robinson and Toumanova married in 1944 and divorced in 1955.
François Alu (born 1993 in Fussy, Cher, France) is a French "Premier Danseur" (first soloist), of the Paris Opera Ballet.
 He entered the Paris Opera Ballet School in 2004, and the Paris Opera Ballet in 2010.
 At his first promotion competition, he was promoted to Coryphée, dancing as a free variation the act II solo of Solor, from La Bayadère by Rudolf Nureyev.
 The next year, he was promoted to "Sujet" (soloist), dancing as a free variation the act III solo of Solor, from La Bayadère by Rudolf Nureyev.
Tamara Toumanova (Russian: Тамара Туманова Georgian: თამარა თუმანოვა , Armenian: Թամար Թումանեան ; 2 March 1919 – 29 May 1996) was a Russian-born American prima ballerina and actress.
 A child of exiles in Paris after the Russian Revolution of 1917, she made her debut at the age of 10 at the children's ballet of the Paris Opera.