John Neville
Hieronymus Karl Frederick Baron von Munchausen
Eric Idle
Desmond / Berthold
Sarah Polley
Sally Salt
Oliver Reed
Vulcan
Charles McKeown
Rupert / Adolphus
Winston Dennis
Bill / Albrecht
Jack Purvis
Jeremy / Gustavus
Valentina Cortese
Queen Ariadne / Violet
Jonathan Pryce
The Right Ordinary Horatio Jackson
Bill Paterson
Henry Salt
Peter Jeffrey
Sultan
Uma Thurman
Venus / Rose
Alison Steadman
Daisy
Ray Cooper
Functionary
Don Henderson
Commander
Robin Williams
King of the Moon
Sting
Heroic Officer
Andrew MacLachlan
Colonel
José Lifante
Dr. Death
Mohamed Badrsalem
Executioner
Kiran Shah
Executioner's Assistant
Franco Adducci
Treasurer
Ettore Martini
First General
Antonio Pistillo
Second General
Michael Polley
Gunner
Tony Smart
Gunner
Laura D'Arista Adam
Theatergoer (uncredited)
Calogero Azzaretto
Pirate (uncredited)
Angelo Casadei
Citizen (uncredited)
Martin Dansky
German Noble (uncredited)
Terry Gilliam
Irritating Singer Inside Fish (uncredited)
Alba Maiolini
Citizen (uncredited)
Franca Scagnetti
Citizen (uncredited)
Luciano Zanussi
Citizen (uncredited)