Steel yourself for a year of photos with Angelina Jolie donning an array of wigs. Today the actress began filming Salt, in which she plays a rogue CIA agent with a possibly secretive Russian past. The spy thriller promises to hearken back to the heady days of action films, with Phillip Noyce of Clear and Present Danger and Patriot Games taking the director's chair. Last year Tom Cruise was set to play the title character-Edwin A. Salt-but when he dropped out the role was changed to suit Jolie. "We had to rethink the whole notion of how a man vs. a woman operates in the business world, in personal relationship and in friendships," said producer Lorenzo di Bonaventura.