Balletmaster Rudolf Nureyev cast him as Mercutio and subsequently Romeo in his version of Romeo and Juliet, also in his Raymonda; he then performed in Nijinska's Le Train Bleu, in Robbins' In the Night, Neumeier's Vaslaw, Lander's Etudes, Nureyev's La Bayadère, Nijinsky's Afternoon of a Faun, Mats Ek's version of Giselle, Boléro by Maurice Béjart and Petit's Le Jeune Homme et la Mort and Les Forains.
He was promoted to the Paris Opera Ballet's highest rank, that of étoile (literally, star), after his debut in the róle of Albrecht in the traditional version of Giselle.
He performed A Suite of Dances as guest artist at New York City Ballet's Jerome Robbins celebration in June 2008.
World-renowned choreographers such as Mats Ek, Jiri Kylian, William Forsythe and John Neumeier have created works especially for Le Riche.
In 2015 he created and served as the co-director of L'Atelier de l'Art Chorégraphique (LAAC) at the Théâtre des Champs-Elysées in Paris, after which he entered the position as head of the Royal Swedish Ballet in Stockholm by August 2017.