Sidonie Fossé - After training at the CNR Rouen and at the Conservatoire National Supérieur de Musique et de Danse in Paris, in the Contemporary section, she joined the Ecole-Atelier Rudra Béjart in 2005 and then the Béjart Ballet Lausanne (BBL) in 2007 under the direction of Maurice Béjart.

In 2009, she worked alongside Joost Vrouenraets, the BBL choreographer, who gave her the lead role in his ballet "Ex Orbis" and with Etienne Béchard who created the "Passager Clandestin" duet specifically for her.

In 2010, she embarked on the Opinion Public company project where she has performed in the company's entire repertoire. From 2011, she contributed to the choreography in creating her first production "Obsolescence".
She did the same with the Opinion Public group choreography for "Mr. Follower" (2015) and "Arcadia" (2017).

She also worked as an Assistant Choreographer with Etienne Béchard to rerun "Post Anima" for the Konzert Theater Bern and in the "Cupidon s'en fout ..." production for the Ballet du Rhin in 2016.