In an interview with news.com.au, Bonham Carter revealed that six years ago she slept over at Windsor Castle with a group of people, including her ex-husband Tim Burton, Daniel Craig and Rachel Weisz.
"I think The Queen has about 10 of them a year so she can meet certain people," Bonham Carter explained, saying that she stayed in what is dubbed the 'Prince Charles Suite.'
"It was a thrill and you really felt like you were in The Crown", she said. "And I remember there was a lady standing by the door, and she just carried on standing there,” she continued.
“And we went to the toilet, came back, and all our bags had been unpacked automatically. I said to her, ‘Are you all right?’ and she said, ‘I’ll just be remaining here. Do you want your bath to be drawn? Will you be wanting tea in the morning?’ It was amazing. It was really surreal.”
Bonham Carter revealed that at dinner with the Queen, she was seated by Prince Philip who was, just as he's portrayed in the show, "very mischievous."