William Sheller, born 1946 in Paris, France, is a french singer, pianist and composer. He's most known for his famous song Un homme heureux. His works present various styles from popular and funny songs like Rock'n'Dollars to instrumental orchestration composition like "Lux Aeterna". He started learning music with Yves Margat, a former student of Gabriel Fauré. His first works for popular music started out with Barbara before he began his long solo career.