Swedish actor Rebecca Ferguson has secured a sought-after role in next year’s most anticipated literary adaptation ‘ The Girl On The Train’. Ferguson will take on the role of Anna, who is married to the ex-husband of the central character Rachel, played by Emily Blunt. The plot centres on three women who are embroiled in a murder mystery when one of them becomes obsessed with a couple she regularly sees from her daily train commute. The third female role is yet to be cast.