Hollywood actress Sienna Miller believes her body is far from perfect and that lighting and special effects are the only reason she looks beautiful on film. The star, who plays artist Andy Warhol's muse Edie Sedgwick in new movie FACTORY GIRL, claims she is nothing special in the looks department, despite having dated hunk Jude Law. Miller says, "I didn't use a body double but they light shots for hours so you don't see every lump and bump. "They put make-up all over your body so it looks like you have a nice bum, whereas normally it's not the same. "There is a lot of make-up on so you don't see the stretch marks that us girls all have."