The Crown and Doctor Who star Matt Smith is reported to be among the latest additions to the cast for HBO's Game of Thrones prequel series, House of the Dragon.

US entertainment industry website Deadline reports that Smith, Pixie star Olivia Cooke and Wanderlust's Emma D'Arcy will join the previously-announced Paddy Considine (The Outsider, Peaky Blinders) in the much-anticipated series, based on Game of Thrones author George RR Martin's Fire & Blood saga.

Olivia Cooke

The series is set 300 years before Game of Thrones and focuses on the House Targaryen.

Deadline says the new show has "five lead characters: King Viserys Targaryen (Considine), Alicent Hightower (Cooke), Princess Rhaenyra Targaryen (D'Arcy), Prince Daemon Targaryen (Smith) as well as Lord Corlys Velaryon, known as the Sea Snake, who becomes Hand to Queen Rhaenyra Targaryen during the Dance of the Dragons".

Emma D'Arcy

It adds that the role of Lord Corlys Velaryon has yet to be cast, with Penny Dreadful star Danny Sapani reportedly in talks. 

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