Kiwi actress Keshia Castle-Hughes is lining up a new role in a high profile new crime series.

Discovery Channel is signing a number of big stars for its upcoming series Manifesto, which tells the story of how a FBI linguistics expert caught the terrorist Unabomber in the 70s.

Deadline reports that Castle-Hughes is negotiations to play Tabby, a street agent who has to keep the linguistics expert, Jim 'Fitz' Fitzgerald, in check in order to catch the killer.

She will be joined by Avatar actor Sam Worthington as Fitz and The Avengers' Paul Bettany as the Unabomber.

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The series is being produced by actor Kevin Spacey and Dana Brunetti, who brought House of Cards to America and kicked off the online streaming trend.

It will be the second original series from Discovery, which is moving into scripted programming. Manifesto is expected to be told over multiple series, following a different case per season.

It is the latest American show Castle-Hughes has scored a role on. She has been on Game of Thrones since season five as Obara Sand, and earlier this year had a leading role on musical drama Roadies.

She will next be seen in war film Thank You for Your Service, alongside Miles Teller, Amy Schumer and Haley Bennett.