Yseult Lendvai was born in Lays-Les-Roses, France. She received her dance training at the Ecole Supérieure de Danse du Quebec. In 1985 she joined Les Grandes Balletts Canadiens as an apprentice. One year later she joined Ballet British Columbia under the direction of Reid Anderson. In 1989 she moved with Anderson to the National Ballet of Canada, where she was promoted to Soloist. In Canada, Yseult Lendvai made a name for herself especially with her profound and touching interpretations of the leading roles in the ballets of John Cranko. As a leading dancer with a wide range of expressive abilities, she also danced in works by Sir Frederick Ashton, William Forsythe, Jiří Kilián, Sir Kenneth MacMillan, John Neumeier, Jerome Robbins and Glen Tetley.
From 1996 to 2004 she was a Principal Dancer with the Stuttgart Ballet, where she danced Tatjana in Onegin, Katherina in The Taming of the Shrew, Juliet in Romeo and Juliet and the Lady in The Lady and the Fool and the main female lead in Poème de l’extase (all John Cranko) as well as Marguerite Gautier in The Lady of the Camellias (John Neumeier), the Princess in The Firebird (Uwe Scholz) and Columbine in Pierrot Lunaire (Glen Tetley). In addition, she danced leading roles in works by, among others, Christian Spuck, Kevin O'Day, Jean Christophe Maillot, Dominique Dumais, Marguerite Donlon, Jean Grand-Maitre, John Alleyne and Douglas Lee, many of whom created solo roles for her. With the Stuttgart Ballet she toured the USA, Japan, Hong Kong and Europe.
As a guest artist she danced Tatjana in Onegin with the Royal Ballet and the ballet of the Teatro alla Scala; Juliet in Cranko's Romeo and Juliet with the Vienna Opera Ballet and the ballet of the Teatro San Carlo in Naples; Katherina in The Taming of the Shrew with the Semper Opera Ballet in Dresden; as well as Tatiana, Juliet and Katherina with the Rome Opera Ballet. Vladimir Malakhov invited her to the Staatsoper Unter den Linden in Berlin to dance the role of the Queen Mother in Patrice Bart's version of Swan Lake.
From 2007 to 2012 Yseult Lendvai was engaged as a ballet mistress for the ballet company of the State Theater Augsburg. From 2012 to 2015 she held the position of Deputy Artistic Director.
In 2016, Yseult Lendvai returned to the Stuttgart Ballet as ballet mistress where she passes on her many years of experience, particularly in the ballets of John Cranko, to the next generation.