This is a list of musicians who have contributed to Arjen Anthony Lucassen's rock opera project Ayreon.
Gary Wehrkamp (Shadow Gallery)
Guthrie Govan (The Aristocrats, ex-Asia)
Jan Somers (Vengeance)
Lori Linstruth
Marcel Coenen (Sun Caged)
Michael Romeo (Symphony X)
Oscar Holleman (ex-Vengeance)
Paul Gilbert
Peer Verschuren (ex-Vengeance)
Rheno Xeros (ex-Bodine)
Ruud Houweling (Cloudmachine)
Steve Hackett (ex-Genesis)
Armand van der Hoff (ex-Bodine)
Jan Bijlsma (ex-Vengeance)
Jolanda Verduijn
Peter Vink (ex-Finch)
Rheno Xeros (ex-Bodine)
Walter Latupeirissa (Snowy White)
Barry Hay (Golden Earring)
Ewa Albering (ex-Quidam)
Jeroen Goossens (ex-Pater Moeskroen)
John McManus (Celtus)
Thijs van Leer (Focus)
Jeroen Goossens
Cleem Determeijer (ex-Finch)
Clive Nolan (Arena)
Erik Norlander (Rocket Scientists)
Gary Wehrkamp (Shadow Gallery)
Derek Sherinian (Planet X, ex-Dream Theater)
Jordan Rudess (Dream Theater)
Joost van den Broek (After Forever)
Keiko Kumagai (Ars Nova)
Keith Emerson (Emerson, Lake & Palmer)
Ken Hensley (ex-Uriah Heep, ex-Blackfoot)
Mark Kelly (Marillion)
Martin Orford (IQ, Jadis)
Oliver Wakeman
René Merkelbach
Rick Wakeman (ex-Yes)
Robby Valentine (Valentine)
Roland Bakker (ex-Vengeance)
Tomas Bodin (The Flower Kings)
Ton Scherpenzeel (Kayak)
Jack Pisters
Dewi Kerstens
Marieke van der Heyden
Taco Kooistra
Maaike Peterse (Kingfisher Sky)
Ed Warby (Gorefest)
Ernst van Ee (Trenody)
Gerard Haitsma (ex-Bodine)
John Snels (ex-Vengeance)
Matt Oligschlager (ex-Vengeance)
Rob Snijders (ex-Celestial Season, Agua de Annique)
Stephen van Haestregt (ex-Within Temptation)
Ernö Olah (Metropole Orchestra)
Pat McManus (Celtus)
Robert Baba
Ben Mathot
List of Ayreon guest musicians Wikipedia (Text) CC BY-SA