Deadline is exclusively reporting that Madeleine Stowe and Stephen Rider are the latest names to join the cast for the upcoming It prequel series Welcome To Derry.

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The series is believed to be set to begin in the 1960s and then lead up to the events of 2017’s It, and it is also said to include the origin story of Pennywise the Clown.

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Much like the synopsis for the series, the roles in which the cast will play is currently being kept under wraps. However, it’s been reported that Stowe will have a recurring role in the series, whilst Rider will be a series regular. Madeleine Stowe’s credits include Revenge and Twelve Monkeys. Stephen Rider’s credits include Daredevil and Instinct.

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An ‘It’ prequel series was announced back in March of this year, with HBO Max given it a series production commitment. Late last year it was reported that Jason Fuchs and Brad Caleb Kane will serve as co-showrunners on the series. Finally, HBO Max gave the project a series order back in February. Fuchs, who is also executive producer, is writing the teleplay for the first episode of the series, while Andy Muschietti will direct multiple episodes, including the pilot. Shelley Meals, Roy Lee and Dan Lin also serve as executive producers.

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Stowe and Rider will join a cast that includes Taylour Paige, Jovan Adepo, James Remar and Chris Chalk.