Amber Heard

The script for "The Ward"  "came at the right time for me," says Carpenter.

It is a taught thriller about a troubled young woman with amnesia named (Amber Heard) who finds herself institutionalized in a mental hospital in the 1960s

Source: http://www.nydailynews.com/entertainment/movies/2011/07/08/2011-07-08_horror_master_john_carpenter_returns_after_ten_year_absence_with_the_ward.html?r=entertainment