"I would hate the idea of her watching it. When you’re playing a real person, you never want to be ghoulish," Foy explains. "I don’t want to pick apart a person. I want to invent someone. So I would hate for her to watch it and think I overdramatized anything."
That being said, The Crown plans to switch out the cast of the series every two seasons to accurately depict the royal family at different times in their lives, which means Foy will only be portraying Queen Elizabeth for a little while longer.