Mony Marc is a Belgian singer. She was the second singer to represent Belgium at the Eurovision Song Contest, in its first year 1956, singing "Le plus beau jour de ma vie" (The most beautiful day of my life) with music by Claude Alix and lyric by David Bee (Fud Leclerc had previously performed "Messieurs les noyés de la Seine" to earn the distinction of being the first Belgian performer at the Contest). During the first contest only the winning song was announced, and so the rank of her song remains unknown.