Actress Margot Robbie is in talks to join "Z for Zachariah", a post-apocalyptic movie that stars Chris Pine and Chiwetel Ejiofor.

The movie is a screen adaptation of the novel by Robert C. O'Brien and centres on a US teen who survived a nuclear war, reports hollywoodreporter.com.

If the deal takes place, Robbie will replace actress Amanda Seyfried, who was originally cast as a teen on a farm who is the sole survivor but soon finds herself with a visitor.