* Brendan Gleeson as Father James Lavelle
* Kelly Reilly as Fiona
* Chris O'Dowd as Jack
* Dylan Moran as Father Michael
* M. Emmet Walsh as Martin
* Isaach de Bankolé as The Man
* Pat Shortt as Francis
* Aidan Gillen as Freddie
* David Wilmot as Simon
* Orla Brady as Veronica
* Marie-Josée Croze as Anne
* John Kavanagh as Joe
* Ardal O'Hanlon as Martin's friend
* Gary Lydon as Bishop
* Kieran O'Reilly as Father Brendan
* Domhnall Gleeson as The Young Man
Please note that this list includes the most prominent roles. There were also several other actors and actresses who appeared in smaller roles.