Evan McGuire
Brendan (voice)

Christen Mooney
Aisling (voice)

Brendan Gleeson
Abbot Cellach (voice)

Mick Lally
Aidan (voice)

Liam Hourican
Brother Tang / Leonardo (voice)

Paul Tylak
Brother Assoua (voice)

Michael McGrath
Adult Brendan (voice)

Paul Young
Brother Square (voice)

Nora Twomey
Additional Voices and Walla (voice)

Alli McCann
Additional Voices and Walla (voice)

Clair Funchion
Additional Voices and Walla (voice)

Conor O'Halloran
Additional Voices and Walla (voice)

Gaelle Hersent
Additional Voices and Walla (voice)

Marie Thorhauge
Additional Voices and Walla (voice)

Sean Ono Lennon
Additional Voices and Walla (voice)

Jonas Hoffmann
Additional Voices and Walla (voice)

Fabian Erlinghäuser
Additional Voices and Walla (voice)

Kairen Waloch
Additional Voices and Walla (voice)

James William O'Halloran
Additional Voices and Walla (voice)