Actress Patricia Clarkson has joined the growing cast of The East for director Zal Batmanglij.

The story centers on a private security firm which protects major corporations from an eco-terrorist group known only as The East. Brit Marling stars as an undercover agent who infiltrates The East, but ends up falling for their leader (Alexander Skarsgård). Patricia Clarkson will portray Brit Marling's boss in the thriller. Ellen Page and Toby Kebbell will also star in The East.

Zal Batmanglij is directing The East from a script he co-wrote with Brit Marling. Production is scheduled to begin later this month in Nashville.