The 36-year-old actress thought about the part "all of the time" and researched heavily for the role despite only appearing on screen for 10 minutes or so, reported Contactmusic.
"While I was preparing for this, I wasn't doing anything else, so I had time to spare. I spent hours and hours. It was my obsession, my daydream.
"You know you spend so much time waiting in lines, getting something fixed or cooking a simple recipe, and she was what I thought about all of the time. I never treated it like a small part.