# List of Ayreon guest musicians

This is a list of musicians who have contributed to the Arjen Anthony Lucassen's rock opera project known as Ayreon.

## Vocals

| Vocalist | The Final Experiment | The Final Experiment (Bonus disc) | Actual Fantasy | Into the Electric Castle | The Dream Sequencer | Flight of the Migrator | Ayreonauts Only | The Human Equation | 01011001 | Elected | Timeline | The Theory of Everything | The Theater Equation | The Source | Ayreon Universe | Electric Castle Live and Other Tales | Transitus | 01011001 – Live Beneath the Waves | Total |
| Amanda Somerville HDK, Kiske/Somerville | | | | | | | | | | | | | | | | | N | | 1 |
| Andi Deris Helloween | | | | | | N | | | | | | | | | | | | | 1 |
| Anneke van Giersbergen ex-The Gathering, Agua de Annique | | | | N | | | | | N | | | | N | | N | N | | N | 6 |
| Astrid van der Veen Ambeon | | N | | | | | N | | | | | | | | | | | | 2 |
| Barry Hay Golden Earring | N | | | | | | | | | | | | | | | | | | 1 |
| Bob Catley Magnum, ex-Hard Rain | | | | | | | | | N | | | | | | | | | | 1 |
| Brittney Slayes Unleash the Archers | | | | | | | | | | | | | | | | | | N | 1 |
| Bruce Dickinson Iron Maiden, ex-Samson | | | | | | N | | | | | | | | | | | | | 1 |
| Cammie Gilbert Oceans of Slumber | | | | | | | | | | | | | | | | | N | | 1 |
| Caroline Westendorp The Charm the Fury | | | | | | | | | | | | | | | | | N | | 1 |
| Cristina Scabbia Lacuna Coil | | | | | | | | | | | | N | | | | | | | 1 |
| Damian Wilson ex-Rick Wakeman, Threshold (UK), Landmarq, Headspace | | | | N | N | N | N | | | | | | | | N | N | | N | 7 |
| Daniel Gildenlöw Pain of Salvation | | | | | | | | | N | | | | | | | | | N | 2 |
| Debby Schreuder | N | | | | | | | | | | | | | | | | | | 1 |
| Dee Snider ex-Twisted Sister | | | | | | | | | | | | | | | | | N | | 1 |
| Devin Townsend Strapping Young Lad, The Devin Townsend Band | | | | | | | | N | | | | | | | | | | | 1 |
| Devon Graves Deadsoul Tribe, ex-Psychotic Waltz | | | | | | | | N | | | | | N | | | | | | 2 |
| Dianne van Giersbergen Ex Libris | | | | | | | | | | | | | | | | N | N | | 2 |
| Edward Reekers ex-Kayak | N | | N | N | N | | | | | | | | | | N | N | | | 6 |
| Edwin Balogh ex-Omega | | | | N | | | | | | | | | | | | N | | | 2 |
| Eric Clayton Saviour Machine | | | | | | | | N | | | | | N | | | | | | 2 |
| Esther Ladiges | | N | | | | | | | | | | | | | | | | | 1 |
| Fabio Lione Vision Divine, Rhapsody of Fire | | | | | | N | | | | | | | | | | | | | 1 |
| Fish ex-Marillion | | | | N | | | | | | | | | | | | N | | | 2 |
| Floor Jansen After Forever, ReVamp, Nightwish | | | | | N | | | | N | | | | | N | N | | | | 4 |
| Gary Hughes Ten | | | | | | | N | | | | | | | | | | | | 1 |
| George Oosthoek Orphanage, Kutschurft | | | | N | | | | | | | | | | | | N | | | 2 |
| Hansi Kürsch Blind Guardian, Demons & Wizards | | | | | | | | | N | | | | | N | N | | | N | 4 |
| Heather Findlay Mostly Autumn | | | | | | | | N | | | | | N | | | | | | 2 |
| Ian Parry Elegy | N | | | | | N | N | | | | | | | | | | | | 3 |
| Irene Jansen ex-Karma | | N | | | | | | N | | | | | N | | N | | | N | 5 |
| Jacqueline Govaert Krezip | | | | | N | | | | | | | | | | | | | | 1 |
| James LaBrie Dream Theater | | | | | | | | N | | | | | N | N | | | | | 3 |
| Janne JB Christoffersson Grand Magus | | | | | | | | | | | | N | | | | | | | 1 |
| Jan-Chris de Koeijer Gorefest | N | | | | | | | | | | | | | | | | | | 1 |
| Jan Willem Ketelaers | | | | | | | | | | | | | | | | N | N | N | 3 |
| Jasper Steverlinck Arid | | | | | | | | | | | N | | | | | | | | 1 |
| Jay van Feggelen ex-Bodine | N | | | N | | | | | | | | | | | N | | | | 3 |
| Johan Edlund Tiamat, Lucyfire | | | | | N | | | | | | | | | | | | | | 1 |
| Johanne James Threshold, Kyrbgrinder | | | | | | | | | | | | | | | | | N | | 1 |
| John "Jaycee" Cuijpers Praying Mantis | | N | | | | | | | | | | | | | N | N | | N | 4 |
| John Wetton Asia, ex-King Crimson | | | | | | | | | | | | N | | | | | | | 1 |
| Jonas Renkse Katatonia | | | | | | | | | N | | | | | | N | | | N | 3 |
| Jørn Lande Jorn, ex-Masterplan, ex-Ark, Vagabond, etc. | | | | | | | | | N | | | | | | | | | | 1 |
| Lana Lane | | | | | N | N | N | | | | | | | | | | | | 3 |
| Lenny Wolf Kingdom Come | N | | | | | | | | | | | | | | | | | | 1 |
| Leon Goewie Vengeance | N | | | | | | N | | | | | | | | | | | | 2 |
| Liselotte Hegt Dial | | | | | | | | | N | | | | | | | | | N | 2 |
| Lisette van den Berg Scarlet Stories | | | | | | | | | | | | | N | N | N | | N | | 4 |
| Lucie Hillen | N | | | | | | | | | | | | | | | | | | 1 |
| Magali Luyten Beautiful Sin, Virus IV | | | | | | | | | N | | | | | | N | | | N | 3 |
| Magnus Ekwall The Quill | | | | | | | | N | | | | | N | | | | | | 2 |
| Marcela Bovio Elfonía, Stream of Passion, MaYaN | | N | | | | | | N | | | | | N | | N | N | N | N | 7 |
| Marjan Welman Elister, Autumn | | | | | | | | | N | | | | | | | | | N | 2 |
| Mark Jansen Epica | | | | | | | | | | | | | | | | N | | | 1 |
| Mark McCrite Rocket Scientists | | | | | N | | | | | | | | | | | | | | 1 |
| Marko Hietala Nightwish, Tarot | | | | | | | | | | | | N | | | N | | | | 2 |
| Michael Eriksen Circus Maximus | | | | | | | | | | | | | | N | | | | | 1 |
| Michael "Mike" Mills Toehider | | | | | | | | | | | | N | N | N | N | | N | N | 6 |
| Mikael Åkerfeldt Opeth, Bloodbath (Swe) | | | | | | | | N | | | | | | | | | | | 1 |
| Mike Baker Shadow Gallery | | | | | | | | N | | | | | | | | | | | 1 |
| Mirjam van Doorn | N | | | | | | | | | | | | | | | | | | 1 |
| Mouse Tuesday Child | | | | | N | | N | | | | | | | | | | | | 2 |
| Neal Morse ex-Spock's Beard, Transatlantic | | | | | N | | | | | | | | | | | | | | 1 |
| Nils K. Rue Pagan's Mind | | | | | | | | | | | | | | N | | | | | 1 |
| Okkie Huysdens | | | N | | | | | | | | | | | | | | | | 1 |
| Paul Manzi ex-Arena | | | | | | | | | | | | | | | | | N | | 1 |
| Peter Daltrey ex-Kaleidoscope | | N | | N | | | | | | | | | | | | | | | 2 |
| Phideaux Xavier | | | | | | | | | N | | | | | | | | | N | 2 |
| Ralf Scheepers Primal Fear, ex-Gamma Ray | | | | | | N | | | | | | | | | | | | | 1 |
| Robby Valentine Valentine | | N | | | | | | | | | | | | | | | | | 1 |
| Robert Soeterboek Wicked Sensation | N | | N | | | N | N | | | | | | | | N | N | | | 6 |
| Robert Westerholt Within Temptation | | | | N | | | | | | | | | | | | | | | 1 |
| Rodney Blaze | | N | | | | | | | | | | | | | | | | | 1 |
| Russell Allen Symphony X, Adrenaline Mob | | | | | | N | | | | | | | | N | | | | | 2 |
| Ruud Houweling Cloudmachine | N | N | | | | | | | | | | | | | | | | | 2 |
| Sara Squadrani Ancient Bards | | | | | | | | | | | | N | | | | | | | 1 |
| Sharon den Adel Within Temptation | | | | N | | | | | | | | | | | | | | | 1 |
| Simone Simons Epica | | | | | | | | | N | | | | | N | | N | N | N | 5 |
| Steve Lee Gotthard | | | | | | | | | N | | | | | | | | | | 1 |
| Timo Kotipelto Stratovarius, Kotipelto | | | | | | N | | | | | | | | | | | | | 1 |
| Tobias Sammet Edguy, Avantasia | | | | | | | | | | N | | | | N | | | | | 2 |
| Tom S. Englund Evergrey | | | | | | | | | N | | | | | | | | | N | 2 |
| Tommy Giles Rogers Between the Buried and Me | | | | | | | | | | | | | | N | | | | | 1 |
| Tommy Karevik Kamelot, Seventh Wonder | | | | | | | | | | | | N | | N | N | | N | | 4 |
| Ty Tabor King's X, Platypus, The Jelly Jam | | | | | | | | | N | | | | | | | | | | 1 |
| Wilmer Waarbroek | | | | | | | | | | | | N | | N | | | N | | 3 |
| Wudstik | | | | | | | | | N | | | | N | | | | | N | 3 |
| Zaher Zorgati Myrath | | | | | | | | | | | | | | N | | | | | 1 |

## Bass

* Armand van der Hoff (ex-Bodine)
* Jan Bijlsma (ex-Vengeance)
* Jolanda Verduijn
* Peter Vink (ex-Finch)
* Rheno Xeros (ex-Bodine)
* Walter Latupeirissa (Snowy White)
* Johan van Stratum (Stream of Passion, Vuur)

## Cello

* Dewi Kerstens
* Marieke van der Heyden
* Taco Kooistra
* Maaike Peterse (Kingfisher Sky)
* Jurriaan Westerveld

## Didgeridoo, Treble recorder

* Jeroen Goossens

## Drums

* 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)

## Flute

* Barry Hay (Golden Earring)
* Ewa Albering (ex-Quidam)
* Jeroen Goossens (ex-Pater Moeskroen)
* John McManus (Celtus)
* Thijs van Leer (Focus)

## Guitar

* Gary Wehrkamp (Shadow Gallery)
* Guthrie Govan (The Aristocrats, ex-Asia)
* Jan Somers (Vengeance)
* Joe Satriani (Chickenfoot)
* Lori Linstruth
* Marcel Coenen (Sun Caged)
* Michael Romeo (Symphony X)
* Oscar Holleman (ex-Vengeance)
* Paul Gilbert (Mr.Big, ex-Racer-X)
* Peer Verschuren (ex-Vengeance)
* Rheno Xeros (ex-Bodine)
* Ruud Houweling (Cloudmachine)
* Steve Hackett (ex-Genesis)
* Timo Somers

## Hurdy-gurdy

* Patty Gurdy

## Keyboard / Harpsichord / Piano / Synths / Hammond

* 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)

## Sitar

* Jack Pisters

## Violin

* Ernö Olah (Metropole Orchestra)
* Pat McManus (Celtus)
* Robert Baba
* Ben Mathot