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

José Lifante

Dr. Death

Mohamed Badrsalem

Executioner

Kiran Shah

Executioner's Assistant

Franco Adducci

Treasurer

Tony Smart

Gunner

Laura D'Arista Adam

Theatergoer (uncredited)

Calogero Azzaretto

Pirate (uncredited)

Angelo Casadei

Citizen (uncredited)

Terry Gilliam

Irritating Singer Inside Fish (uncredited)

Alba Maiolini

Citizen (uncredited)

Franca Scagnetti

Citizen (uncredited)

Luciano Zanussi

Citizen (uncredited)