TRAILER: Saoirse Ronan Is a Tiny Assassin in 'Hanna'

Anyone who's seen Saoirse Ronan in Atonement or The Lovely Bones might not think she's got a violent, scary bone in her body. Well, she might not in real life, but in the trailer for action thriller Hanna, she sures seems pretty scary as an assassin. We wouldn't want to run into her in a dark alley, big blue eyes or not.

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Joe Wright directs this wintry killer movie, co-starring Erica Bana as the father of Hanna, who trains his little girl to grow upt o be just like him.

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The trouble starts when Eric exits their Arctic home, leaving Hanna to be scooped up by some government spy group helmed by Cate Blanchett.

CATCH THE TRAILER BELOW!