Olivia Cooke Pixie Ben Hardy Frank McCullen Daryl McCormack Harland McKenna Colm Meaney Dermot O'Brien Alec Baldwin Father Hector McGrath Rory Fleck-Byrne Colin Fra Fee Fergus Turlough Convery Mickey O'Brien Chris Walley Daniel Donnelly Pat Shortt Father Daly Frankie McCafferty Father McGinley Ned Dennehy Seamus Dylan Moran Raymond Donnelly Sebastian de Souza Gareth Esme Thompson Shannon, the Barmaid Packy Lee Tommy Barbara Adair Maeve Smith David Rawle Altar Boy Charlie Kranz American Dad (uncredited)