Nightwish is a Finnish symphonic metal band from Kitee, Finland.
The band was formed in 1996 by lead songwriter and keyboardist Tuomas Holopainen, guitarist Emppu Vuorinen, and former lead singer Tarja Turunen.

Members:
Tuomas Holopainen – keyboards, piano, synthesizers (1996–present), male vocals (1996–1998)
Emppu Vuorinen – guitars (1996–present), bass (1997)
Troy Donockley – uilleann pipes, tin whistle, low whistle, guitars, bouzouki, bodhrán, male vocals (2013–present; session / touring member: 2007–2013)
Floor Jansen – lead vocals (2013–present; touring member: 2012–2013)
Kai Hahto – drums, percussion (2019–present; session / touring member: 2014–2019)

Session member:
Jukka Koskinen – bass (2021–present)

Former members:
Sami Vänskä – bass (1998–2001)
Tarja Turunen – lead vocals (1996–2005)
Anette Olzon – lead vocals (2007–2012)
Jukka Nevalainen – drums, percussion (1997–2019; hiatus 2014–2019)
Marko Hietala – bass, male vocals (2001–2021), acoustic guitar (2006–2021)

Former session members:
Samppa Hirvonen – bass (1997–1998, live)
Marianna Pellinen – keyboards, backing vocals (1997–1998, live)
Esa Lehtinen – flutes (1997–2000, studio)