Emily Mortimer has joined the cast of the crime thriller, Transsiberian for Spain's Filmax Entertainment and Germany's Universum Film GmbH.

She's replacing Samantha Morton in the film written and directed by Brad Anderson. Also starring is Woody Harrelson, Kate Mara, Eduardo Noriega and Ben Kingsley. The Hollywood Reporter says the film revolves around an American couple, Roy (Harrelson) and Jessie (Mortimer), who travel on the famed Trans-Siberian train from China to Moscow. They soon encounter another couple, Abby (Mara) and her boyfriend, Carlos (Noriega), and what seems to be a simple train journey turns into a chase full of deception and murder. Kingsley rounds out the cast as a Russian police officer hot on the trail of the couples.

Transsiberian began production last week in Lithuania, and will move to Beijing and Russia next year.