Ray Panthaki plays as DI Rav Sangha in The Serpent Queen.
Ray Panthaki is the top #1 member of the cast and appears in 24 episodes.

Enzo Cilenti is a British stage, film and television actor of Italian heritage. He holds a degree in French and Spanish from the University of Nottingham, England, UK.

Enzo Cilenti plays as Tiberius Claudius Nero in The Serpent Queen.
Enzo Cilenti is the top #2 member of the cast and appears in 8 episodes.

Barry Atsma is a Dutch actor. The family into which he was born moved many times, because Atsma's father worked as an expat for the Dutch-British multinational Unilever. Barry Atsma spent part of his youth in United Kingdom, Greece, Brasil and the Netherlands.

Barry Atsma plays as Montmorency in The Serpent Queen.
Barry Atsma is the top #3 member of the cast and appears in 5 episodes.

Samantha Jane Morton (born 13 May 1977) is an English actress and film director. She began her performing career with guest roles in television shows such as Soldier Soldier and Boon before making her film debut in the 1997 drama film This Is the Sea, playing the character of Hazel Stokes. After a string of roles in low-budget and television films, she landed the role of Hattie in 1999's Sweet and Lowdown, for which she received the attention from Hollywood, the critical acclaim and an Academy Award nomination for Best Supporting Actress. Morton subsequently starred in 2002's Minority Report and Morvern Callar. She received her second Academy Award nomination for her performance as the young Irish mother coping with life in New York City, Sarah, in 2003's In America. Morton starred in 2004's Enduring Love and The Libertine and 2005's Lassie. She received won a Golden Globe for Best Actress in a Television Movie for her role as Myra Hindley in 2006's Longford. She appeared in the 2007 biographical films Control, Elizabeth: The Golden Age and Mister Lonely, and she starred in 2008's Synecdoche, New York. Morton appeared in the 2009 critically acclaimed The Messenger. She made her directorial debut in the English television film The Unloved. Description above from the Wikipedia article Samantha Morton, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Samantha Morton plays as Catherine de Medici in The Serpent Queen.
Samantha Morton is the top #4 member of the cast and appears in 5 episodes.

Ludivine Sagnier (born 3 July 1979) is a French actress and model, who has worked in 33 movies since 1989. She was nominated for two César Awards for Best Supporting Actress in Swimming Pool (2003) and Un secret (2007).

Ludivine Sagnier plays as Diane de Poitiers in The Serpent Queen.
Ludivine Sagnier is the top #5 member of the cast and appears in 5 episodes.

Amrita Acharia (also spelled Acharya) is a Norwegian actress of Ukrainian and Nepalese background. Acharia was born in Nepal to a Nepalese father and Ukrainian mother. She grew up in Kathmandu, Ukraine, England and Tromsø. She speaks Ukrainian, Russian and English, in addition to learning Norwegian when she moved to Norway at age thirteen. After finishing high school in Norway, she moved to England at age nineteen to pursue her acting career. Acharia played the role of the Dothraki handmaiden Irri in the first two seasons of Game of Thrones. Her character was written out of the series during the second season, despite surviving far longer in the books upon which the series is based. In 2011, Acharia starred in the one off BBC Christmas show, Lapland.

Amrita Acharia plays as Aabis in The Serpent Queen.
Amrita Acharia is the top #6 member of the cast and appears in 5 episodes.

Naomi Battrick (born 11 April 1991) is an English actress.

Naomi Battrick plays as Ann D'Etampes in The Serpent Queen.
Naomi Battrick is the top #7 member of the cast and appears in 5 episodes.

Raza Jaffrey was born in 1975 in Liverpool. He is an actor.

Raza Jaffrey plays as François Guise in The Serpent Queen.
Raza Jaffrey is the top #8 member of the cast and appears in 5 episodes.

Danny Kirrane plays as Louis de Bourbon in The Serpent Queen.
Danny Kirrane is the top #9 member of the cast and appears in 5 episodes.

Liv Hill is originally from Pembrokeshire, Wales, but she grew up in England and currently lives in Derby. Liv trains at The Talent 1st Organisation and was first seen in one of the title roles of the critically acclaimed BBC drama, “Three Girls.”

Liv Hill plays as Young Catherine in The Serpent Queen.
Liv Hill is the top #10 member of the cast and appears in 5 episodes.