- Marc Warren - Rochefort
- Tamla Kari - Constance
- Ed Stoppard - Lemay
- Rupert Everett - Governor Feron
- Liam Cunningham - Belgard
- JJ Feild - Marsac
- Allan Corduner - Van Laar
- Robert Glenister - Duke of Lorraine
- Amy Nuttall - Agnès
- Leo Gregory - Marmion
- Steve Evets - Bertrand
- Christopher Fulford - Gus
- John Lightbody - Captain Trudeau
- Perdita Weeks - Louise
- Anton Saunders - Didi
- Nicholas Blane - Duc De Barville
- Alan Rothwell - Villager
- Peter Sullivan - Vargas
- Miles Anderson - Renard
- Sean Pertwee - Sarazin
- Tara Fitzgerald - Marie de Medici
- Zoë Tapper - Alice Clerbeaux
- Terence Beesley - General Lantier
- Richard Dormer - Christophe
- Fiona O'Shaughnessy - Juliette
- David Pearse - Dube
- Naomi Radcliffe - Annabelle
- Sarah Smart - Caroline
- Paul McGann - St Pierre
- Paul McGann - Saint Pierre
- Meera Syal - Theresa
- Harriet Thorpe - Lady Francoise
- Benjamin Whitrow - Priest
- John Woodvine - Abbot
- Mark Williams - Pathologist
- Annabelle Wallis - Ninon de Larroque
- Victoria Alcock - Claudette
- Shenagh Govan - Madame Rastoil
- Helen Cotterill - Drunk Woman
- Emily Beecham - Adèle Bessett
- Abigail Rice - Adèle's Servant
- Vlastina Svátková - Madame Murchand
- Denise Gough - Suzette
- Anna Skellern - Maria Bonnaire
- Phoebe Fox - Duchess of Savoy
- Fiona Glascott - Flea
- Václav Chalupa - Servant of De Mauvoisin
- Booda - Senior Royal Guard
- Alice Sanders - Fleur Baudin
- Hannah Sharp - Thérèse
- Vinnie Jones - Labarge
- Alice Patten - Sister Hélène
- Gabrielle Reidy - Mother Superior
- Holly Earl - Céline
- Charlotte Hope - Charlotte Mellendorf
- Virginia Fiol - Constance's Maid
- Bohdan Poraj - Bonacieux
- Olivia Llewellyn - Lucie De Foix
- Sandra Reid - Simone Pepin
- Colin Salmon - Tariq
- Antonia Thomas - Samara
- Finbar Lynch - Baltasar
- Emma Lowndes - Emilie
- Ellie Haddington - Josette
- Barney White - Edmond
- Celeste Dodwell - Prostitute
- Linzey Cocker - Jeanne
- Katie Lightfoot - Madame Fernel
- Phoebe Dynevor - Camille
- Ellie Bamber - Martine
- Emma Hamilton - Eleanor
- Amanda Wass - Young Girl
- Chelsea Grant - Arabella
- Marianne Oldham - Catherine
- Hara Yannas - Sister Teresa
- Charlotte Salt - Marguerite
- Michael Ballard - Chief Adjutant
- Chris Corrigan - Voisard
- Sam Clemmett - Luc
- Oliver Chris - Duke of Beaufort
- Jodie Hay - Mob Woman
- Francis Magee - Hubert
- Duran Fulton Brown - Leon
- Christopher Brand - Gaoler
- Ian Conningham - Nortier (as Ian Connigham)
- Lisa McGrillis - Josephine
- Olivia Poulet - Henrietta Marie
- James Callis - Émile Bonnaire
- Lucie Černá - Esmerelda
- Barbora Černá - Christina
- Monika Timková - Rosalie
- Matt Cross - Durand
- Leah Haile - Rochelle
- Crispin Letts - Magistrate Bellavoix
- Melanie Kilburn - Audrey
- Dan Parr - Cadet Clairmont
- Tom Morley - Cadet Brujon
- Thalissa Teixeira - Sylvie
- Matthew McNulty - Lucien Grimaud
- Lily Loveless - Elodie
- Andre Flynn - Gaston
- Matt Stokoe - Captain Marcheaux
- Tom McCall - Espoir
- Joe Wredden - Dujon
- Adrian Schiller - Gontard
- John Warnaby - Paul Meunier
- Alexandre Dumas
Vinnie Jones interpreta a Labarge en la serie.
Luke Pasqualino interpreta a D'Artagnan en la serie.
Santiago Cabrera hace el papel de Aramis.
Tom Burke interpreta a Athos en la serie.
Howard Charles interpreta a Porthos en la serie.
Ryan Gage interpreta a King Louis en la serie.
Hugo Speer interpreta a Treville en la serie.
Alexandra Dowling hace el papel de Queen Anne.
Maimie McCoy interpreta a Milady de Winter en la serie.
Tamla Kari interpreta a Constance en la serie.
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