Stewart said that when she was getting ready to play Princess Diana in “Spencer,” she had a hard time hearing the princess’s voice in her head.
“There was such a long period of time where I couldn’t hear it. I could do an English accent, but there was something that was, like — you’re never not you,” Stewart confessed to Kidman in a duel interview for Variety.
Eventually, Stewart adapted.
“Maybe a week before we started shooting the movie, she did show up, and I could fully relate,” Stewart said. “She became a kind of friend; you do the best impressions of your best friends. At the last hour, I got lucky and got it, or got whatever it was that I got to.”
“She’s a heavy smoker. I’m not. That was a huge key to it,” Kidman said. “I started smoking, which I know you’re not meant to say, and then gave it up the minute I stopped.”
Kidman admitted that trying to imitate Ball’s sound made her very nervous.
“There’s a rhythm to Lucy. I had to lean into the sounds, and slowly, it would wash into my mouth, my body, my brain, my psyche,” she explained. “Suddenly she was there — she just appeared. Then it was effortless, but the work it took to become effortless was climbing the mountain.”
You can see the complete conversation with Stewart and Kidman below.