31 "The Crown" Season 4 Behind-The-Scenes Facts You Probably Didn't Know, But Should

Emma elaborated, saying, "I really enjoyed that because it made me have to appreciate and have to understand exactly where she'd come from and exactly where she was going."

Later on, Emma found out she got the role of Princess Diana when she was with Josh for a chemistry read. Emma recalled Benjamin Caron, one of the directors and executive producers, turning to her and simply saying, "Will you be our Diana?"

Also, Emma's mom is a speech therapist and helped her prepare. She said, "No matter what Diana is saying, it kind of goes down at the end. It’s like a sadness."

It's centered and leaning to one side, in case you're wondering.

Gillian said, "I worked with a movement coach as to where her weight was carried, the fact that she put most of her weight on the front of her feet. Her left foot is always slightly pigeon-toed. She swings her left arm, kind of pumps herself through the room. Those are things that if you want to play Margaret Thatcher, you don’t want to miss."

David also encouraged Amy and The Crown's design team to make the dress their own too. Amy elaborated, saying, "He said, 'Just do it.' He wasn’t precious about it or neurotic about it. That released us from any fear. We just went for the feel of it, the look of it, the size of it. Big sleeves, big frills. We didn’t get too stressed. Maybe there’s 201 pearls and we’ve only done 200."

Also while in Scotland, Olivia hilariously convinced everyone to watch Naked Attraction together.

Ben explained that one of the rehearsals involved an exercise where only one of them could put their hand on Josh's and Emerald as Camilla did it first and kept it there throughout the scene. Emma said, "It kind of brought to our attention the fact that, regardless if Josh was physically there, we [Camilla and Diana] were battling it out over him [Charles]."

Josh hilariously said, "Sometimes she would just have this random spirt of madness and it might not be six o'clock, and we could just say, 'It's six o'clock somewhere.'"

She explained, "We tried different ways of coloring and staining, making a gap, but in the end, we decided against it. [Instead,] I figured out a way to hold my mouth so that I had more of an overbite."

She also said that those scenes were some of the hardest because they involved long consecutive filming days, and so many years were depicted.

In real life, Diana reportedly brought nearly 200 outfits for the tour.

Emma explained, "I'm asthmatic and I had been ill for a while with a bad cough. We were meant to be flying back that night to the UK [from filming in Spain], so we went past a hospital to get me antibiotics. The doctors gave me an oxygen test and said, 'We cannot let you go because your oxygen levels are so low,' so I was hospitalized."