William Rousseau is a French singer and composer.
William Rousseau moves to Paris in 2002 and signs as a composer for Warner. He writes songs for Nolwenn Leroy, Roch Voisine, Anggun, Chimène Badi, Christophe Willem... ·
In 2005, he meets Dove Attia and with his friend Rod Janois presents two songs for the musical Le Roi Soleil. After this project, he joins the team of composers of Mozart, l'opéra rock (2009), 1789 : Les Amants de la Bastille (2012) and Mistinguett, reine des années folles (2014).
In 2009, he edites his first album solo : Ton homme en passant, with Jérôme Attal's lyrics.
In 2012, with Jean-Pierre Pilot, he writes the song Echo (You and I) for Anggun who is the French candidate at the Eurovision Song Contest. Always with Jean-Pierre Pilot, he produces with Olivier Schultheis Elles & Lui by Alain Chamfort.