Erno Matti Juhani "Emppu" Vuorinen (born 24 June 1978) is a Finnish guitarist, most famous for being a founding member and occasional songwriter of the symphonic metal band Nightwish. He is the oldest of five children, having a twin brother and three younger sisters. He started to play guitar as a private study at the age of 12 and since then has played in various bands including Nightwish, Brother Firetribe, Barilari, Almah, and Altaria.