 Malcolm McDowell as a character Emperor Gaius Germanicus Caesar (Caligula) | Malcolm McDowell also starred in the next movies:- "Between Strangers" in a role of Alan Baxter;
- "A Clockwork Orange" in a role of Alexander 'Alex' de Large;
- "Blue Thunder" in a role of Col. F.E. Cochrane;
- "I Spy" in a role of Arnold Gundars;
- "Evilenko" in a role of Andrej Romanovic Evilenko;
- "Firestarter 2: Rekindled" in a role of John Rainbird;
- "Gangster No. 1" in a role of Gangster 55;
- "The List" in a role of Desmond Larochette;
- "Cut Off" in a role of James Burton;
- "Robot Chicken: Star Wars" in a role of Orientation Instructor;
- "If...." in a role of Mick Travis;
- "Cat People" in a role of Paul Gallier;
- "Dinotopia: Quest for the Ruby Sunstone" in a role of Ogthar;
- "Star Trek: Generations" in a role of Dr. Tolian Soran;
- "Halloween II" in a role of Dr. Samuel Loomis;
- "Blue Gold: World Water Wars" in a role of Narrator;
- "Moon 44" in a role of Major Lee;
- "Class of 1999" in a role of Doctor Miles Longford;
- "The Book of Eli" in a role of Lombardi;
- "Fist of the North Star" in a role of Ryuken;
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 Teresa Ann Savoy as a character Julia Drusilla | Teresa Ann Savoy starred only in the movie "Caligula" |
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 Helen Mirren as a character Caesonia | Helen Mirren also starred in the next movies:- "Excalibur" in a role of Morgana;
- "The Prince of Egypt" in a role of The Queen;
- "Last Orders" in a role of Amy Dodds;
- "The Queen" in a role of The Queen;
- "Shadowboxer" in a role of Rose;
- "The Cook the Thief His Wife & Her Lover" in a role of Georgina Spica;
- "White Nights" in a role of Galina Ivanova;
- "Calendar Girls" in a role of Chris Harper;
- "National Treasure: Book of Secrets" in a role of Emily Appleton;
- "2010" in a role of Tanya Kirbuk;
- "Teaching Mrs. Tingle" in a role of Mrs. Eve Tingle;
- "The Clearing" in a role of Eileen Hayes;
- "The Long Good Friday" in a role of Victoria;
- "State of Play" in a role of Cameron Lynne;
- "Herostratus";
- "The Mosquito Coast" in a role of Mother Fox;
- "Door to Door" in a role of Mrs. Porter;
- "The Last Station" in a role of Sofya Tolstaya;
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 Peter O'Toole as a character Emperor Tiberius Caesar | Peter O'Toole also starred in the next movies:- "King Ralph" in a role of Sir Cedric Willingham;
- "The Last Emperor" in a role of Reginald Johnston (R.J.);
- "Lawrence of Arabia" in a role of T.E. Lawrence;
- "The Lion in Winter" in a role of Henry II;
- "One Night with the King" in a role of Samuel, the Prophet;
- "Ratatouille" in a role of Anton Ego;
- "My Favorite Year" in a role of Alan Swann;
- "Supergirl" in a role of Zaltar;
- "Dean Spanley" in a role of Fisk Senior;
- "FairyTale: A True Story" in a role of Sir Arthur Conan Doyle;
- "How to Steal a Million" in a role of Simon Dermott;
- "Becket" in a role of King Henry II;
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 John Steiner as a character Longinus | John Steiner starred only in the movie "Caligula" |
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 Guido Mannari as a character Macro | Guido Mannari starred only in the movie "Caligula" |
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 Paolo Bonacelli as a character Chaerea | Paolo Bonacelli also starred in the next movies:- "Midnight Express" in a role of Rifki;
- "The Stendhal Syndrome" in a role of Dr. Cavanna;
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 Leopoldo Trieste as a character Charicles | Leopoldo Trieste also starred in the next movies:- "The Name of the Rose" in a role of Michele da Cesena;
- "Don't Look Now" in a role of Hotel Manager;
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 Giancarlo Badessi as a character Claudius | Giancarlo Badessi starred only in the movie "Caligula" |
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 Mirella D'Angelo as a character Livia | Mirella D'Angelo starred only in the movie "Caligula" |
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 Anneka Di Lorenzo as a character Messalina | Anneka Di Lorenzo starred only in the movie "Caligula" |
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 Lori Wagner as a character Agrippina | Lori Wagner starred only in the movie "Caligula" |
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 Adriana Asti as a character Ennia | Adriana Asti starred only in the movie "Caligula" |
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 John Gielgud as a character Nerva | John Gielgud also starred in the next movies:- "The Elephant Man" in a role of Carr Gomm;
- "First Knight" in a role of Oswald;
- "Gandhi" in a role of Lord Irwin;
- "The Shoes of the Fisherman" in a role of The Elder Pope;
- "Murder by Decree" in a role of Prime Minister Lord Salisbury;
- "Chariots of Fire" in a role of Master of Trinity;
- "Becket" in a role of King Louis VII of France;
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 Bruno Brive as a character Gemellus | Bruno Brive starred only in the movie "Caligula" |
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