Los Angeles, Nov 25 : Actress Angelina Jolie has started chain smoking due to stress amidst her divorce battle with actor Brad Pitt.According to a source, despite undergoing surgeries to avoid cancer, the "Maleficent" actress is "smoking like a chimney", reports aceshowbiz.com."Angie doesn t eat, she chain smokes. She easily goes through two packs a day. Going up against Brad has been the hardest thing Angie has ever faced. She s stressed out and in a constant state of anxiety," the source said."The cigarettes kill her appetite, but she s already skin and bones. The last thing she should be doing is skipping meals," the source added.Earlier, there were reports that Jolie and Pitt might reunite for Thanksgiving after their six children kept begging them to spend the holiday together but later the plan did not work out.