Daniel Auteuil as Guillaume de Montauban, dit Dragon Rouge

Sergi López as Raoul de Ventadour

Emmanuelle Devos as Gisela von Bingen

Gilbert Melki as Micholas Mespoulède

Nicolas Nollet as Félix de Sisteron

Titoff as Hugues de Pertuys

Maurice Garrel as Duc de Belzince

Claude Perron as Isabelle de Ventadour

Frédéric Proust as Baron Léon de Courtenay

Jean-François Gallotte as Pape Innocent III

Bernard Blancan as Le sergent de Guillaume

Arno Feffer as Gace Brûlé

Rewan Aggoune as

Didier Agostini as Cavalier de Mespoulede

Raphaël Beauville as Cavalier de Mespoulede

Roman Berthelot as Michel

Marie-Louise Bosc as Vieille none

Philippe Carlou as Cavalier de Mespoulede

Clara Caton as Bébé

Pierre Caton as Bébé

Eddy Cormier as Soldat au tronc

Mickaël Dufourneaud as

Lionel Gauthier as Cavalier de Mespoulede

Jean-Claude Janer as Éminence grise du pape

Yaniss Lespert as Guillaume jeune

Vincent Londez as

Laurent Malraux as Cavalier de Mespoulede

Laurie Marconcini as

Jean-Loup Michou as Cavalier de Mespoulede

Sébastien Nouar as Bruno

Olivier Peissel as Cavalier de Mespoulede

Gianfranco Poddighe as Cavalier de Mespoulede

Bruno Predebon as

Philippe Tezenas Du Montcel as Cavalier de Mespoulede