Agnes entered the Paris Opera Ballet company in 1987 at the age of 16, became Coryphée in 1988, Sujet in 1989 and première danseuse in 1993.
She demonstrated her talents to this major ballet company and was named étoile after a performance of Swan Lake in October 1997.
As of 2009, Agnes Letestu was nearly at the end of her ballerina career (she was then 38) but she hopes to continue to live her passion for ballet through teaching to the youngest.
In October, 2013, she appeared in 'La Dame aux Camelias' at The Paris Opera Ballet in her farewell performance for the company, portraying Marguerite Gautier to great acclaim.
In the Middle, Somewhat Elevated (Forsythe), Etudes (Lander), Gamzatti in La Bayadère (Petipa/ Nureyev), Glass Pieces (Robbins), Serenade (Balanchine), Le Jeune homme et la Mort (Petit), Bathilde/Myrtha in Mats Ek's Giselle, Odette/Odile in Swan Lake, Terpsichore in Apollo, The pas de deux in Agon.