At the NYC premiere of A Mighty Heart Wednesday night, Jolie, 32, said that the reason she’s been shedding pounds is because she’s been grieving over the death of her mother, Marcheline Bertrand, who died of ovarian cancer in January, reports US Magazine.

"I've always been lean and this year I lost my mom and I've gone through a lot,�? said the actress, who is currently in New York with boyfriend Brad Pitt, 43, and their children, Maddox, 5, Pax, 3, Zahara, 2, and one-year-old Shiloh.

"I have four kids and I finished breastfeeding – it's been hard to get my nutrition back on track."

"Instead of people saying I look like a person dealing with something emotionally, they assume it's because I want to fit into skinny jeans."

She added, "Someone saying to me that I'm thin is not a compliment.�?