The 27-year-old 'The Girl with the Dragon Tattoo' star she eats all the time and her vegan lifestyle helps her keep trim, reported New York Post.
"Of course I eat, I eat a lot. I love to eat. But I'm a vegan. I eat all the time. I even eat bread - especially if it's good and if I get it free," Mara said.
The petite actress, who stands at just 5 feet 3 inches, is the currently the face of Calvin Klein's latest fragrance 'Down Town'.