Vo filme Posol: Príbeh Johanky z Arku hrajú Milla Jovovich (Joan of Arc), John Malkovich (Charles VII), Faye Dunaway (Yolande of Aragon), Dustin Hoffman (Joan's conscience), Pascal Greggory (The Duke of Alençon), Vincent Cassel (Gilles de Rais), Tchéky Karyo (Jean de Dunois), Richard Ridings (La Hire), Desmond Harrington (Aulon), Timothy West (Cauchon), Rab Affleck (Comrade), Stéphane Algoud (Look Out), Edwin Apps (Bishop), David Bailie (English Judge), David Barber (English Judge), Timothy Bateson (English Judge), David Begg (Nobleman), Christian Barbier (Captain), Christian Bergner (Captain), Andrew Birkin (Talbot), Dominic Borrelli (English Judge), John Boswall (Old Priest), Matthew Bowyer (The Bludgeoned French Soldier), Paul Brooke (Domremy's Priest), Bruce Byron (Joan's Father), Charles Cork (Vaucouleurs' Priest), Patrice Cossonneau (Captain), Tony D'Amario (Compiegne's Mayor), Daniel Daujon (Church's Peer), Tonio Descanvelle (Xaintrailles), Philippe du Janerand (Dijon), Sissi Duparc (Mary of Anjou's Lady's Companion), Barbara Elbourn (The Aunt), Christian Erickson (La Tremoille), Tara Flanagan (A woman), Bruno Flender (Inquisitor), Serge Fournier (a father of the church), David Gant (The Duke of Bedford), Sydney Golder (the cell guard), Jessica Goldman (Lady in Waiting of the Duchess of Bedford), Framboise Gommendy (Joan's mother), Robert Goodman (Black beard), Jean-Pierre Gos (Laxart), Joanne Greenwood (Catherine), Bernard Grenet (Bishop of senlis), Valerie Griffiths (midwife), Timothée Grimblat (Joan's concience (child)), Richard Guille (a guard in Rouen), Thierry Guilmard (an assessor), Jérôme Hankins (a noble), Jacques Herlin (the priest of Orleans), Len Hibberd (a rapist), Didier Hoarau (an assessor), Vera Jakob (a woman), Michael Jenn (The Duke of Burgundy), Toby Jones (English Judge), Gérard Krawczyk (a father of the Church), Richard Leaf (Joan's conscience (young men)), Franck Lebreton (an assessor), Joseph Malerba (Beaurevoir guard), Dominique Marcas (an inquisitor), Eric Mariotto (young monk), René Marquant (a priest), Carl McCrystal (Glasdale), Gina McKee (the Duchess of Bedford), Phil McKee (Red beard), Simon Meacock (a soldier), John Merrick (Regnault of Chartres), Joseph O'Conor (chief inquisitor), Quentin Ogier (Louis), Mélanie Page (a young girl), Brian Pettifer (the executioner / the torturer of the trial), Philip Philmar (an english judge), Brian Poyser (an english judge), Olivier Rabourdin (Richemont), Vincent Regan (Buck), René Remblier (Dijon's assistant), Joseph Rezwin (Poitiers' Inquisitor), Ralph Riach (an english judge), Mark Richards (Rouen guard), Malcolm Rogers (bishop), Tara Römer (Jean of Gamaches), Julie-Anne Roth (a young girl), Olga Sékulic (Marie of Anjou), Vincent Tulli (Orleans' physicist), Jane Valentine (Joan (8 years)), Jemima West (Girl), Tat Whalley (Raymond), Peter Whitfield (an english judge), Frédéric Witta (an inquisitor).