Aidan Gillen
— Dave Allen
Ian McElhinney
— Priest
Julian Rhind-Tutt
— Richard Stone
Conleth Hill
— John O'Mahony
Ferdia Walsh-Peelo
— Dave, aged 18
Robert Bathurst
— Charles Curran
Pauline McLynn
— Sister Mary
Miranda Hennessy
— Sketch Artist
Tommy Tiernan
— Cully Tynan O'Mahony
Joanne Crawford
— Jean O'Mahony
Simon Day
— Lew Grade
Sam Hardy
— John, aged 7
Daniel Kendrick
— Kenny
Ely Solan
— Dave, aged 12
David Seymour
— Sketch Artist
Gareth O'Connor
— John, aged 20
Abe Smyth
— Sketch Artist
Senan Jennings
— Dave, aged 5
Colin Ash
— Tailor
Seán Treacy
— John aged 14
Steven Shapland
— Sketch Artist
Jonathan Jules
— Comedian
Brett Wilson
— Clive
Richard Clements
— Martin
Mark Quigley
— Butlins Camper (uncredited)