IBNLive | Sienna Miller in talks for 'American Sniper'? IBNLive London: Actress Sienna Miller is in talks to star in 'American Sniper'. The 32-year-old actress is in early negotiations to take on the lead female role, opposite Bradley Cooper, in Clint Eastwood's upcoming movie, reported Contactmusic. Jaimie Alexander, 30 ... Sienna Miller to star in 'American Sniper' Sienna Miller to star in American Sniper Sienna Miller Lands Female Lead In Clint Eastwood's American Sniper |