Tuomas Holopainen & Nightwish At Wacken Open Air 2018 Tuomas Lauri Johannes Holopainen, born 25 December 1976, is a Finnish songwriter, multi instrumentalist and record producer, best known as the founder, leader, keyboardist and songwriter of symphonic metal band  Nightwish. Photo Gallery More about Tuomas Holopainen Share It Twitter Share Tumblr Share Pinterest Save