Game of Thrones' Kit Harington has signed on to join Warner Bros. and Legendary Pictures' The Seventh Son, during the HBO series' hiatus.

Kit Harington joins a cast that includes Jeff Bridges, Ben Barnes, Julianne Moore, Jennifer Lawrence and Alicia Vikander with Sergey Bodrov helming.

The Seventh Son is adapted from Joseph Delaney's young adult series about a teen who's the seventh son of a seventh son, and learns about wizardry from a forbidding spook.

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Kit Harington will play the former apprentice of Jeff Bridges' character.

Matt Greenberg penned the script.

Production is expected to start sometime in April.