Speaking withDeadline, the Golden Globe winner said she was pulled into the storys very damaged protagonist.

I think its very relatable.

The film, based on the best-selling novel byPaula Hawkins, sees Blunt as Rachel Watson.

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Credit: Monica Schipper/Getty Images

One day, she sees something shocking and becomes entwined with the mystery that follows.

And yet shes right, and nobody believes her.

The idea of playing a part like that where you just feel like youre drowning is exciting.

Ive never played a blackout drunk before, so this is new to me now.

The Girl on the Traindebuts in theaters on Oct. 7.

Head toDeadlinefor more from Blunts interview.