Eric Bana is in negotiations to star alongside Saoirse Ronan in Joe Wright's kid assassin film Hanna.  The synopsis provided by Variety follows:

Story centers on a 14-year-old girl who has spent her life living in the woods and is trained by her father to be an assassin. She then leaves the wilderness for the first time to assassinate a high-ranking government official who has a lot to hide.

No word on what role Bana will play. Wright is known for directing Pride & Prejudice, Atonement, and most recently, The Soloist.  Ronan, who starred in The Lovely Bones, will reteam with Wright, having previously worked on Atonement together.  The Focus Features pic is set to shoot in Germany in March with a script by Scott Lochhead and a screenplay by David Farr.