Emily Blunt stars as Rachel Watson, a recent divorcee, in forthcoming film The Girl on the Train. She soon becomes obsessed with her version of a "perfect couple", who live in a house that her train passes every day. When she wakes up hungover and sore, she realises she may have done something terrible.

Rebecca Ferguson, Haley Bennett, Justin Theroux, Luke Evans, Allison Janney, Edgar Ramirez, Lisa Kudrow and Laura Prepon star in the film, which hits theatres on October 7.

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