Prior to the event at The Orangery, located next to Kensington Palace in Kensington Gardens, Beatrice attended the launch party of Rebecca and Nicky's new Holiday capsule collection in the British capital.

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Little is known about the plot for Yellowstone's final chapter, with Christina Voros —who directed four out of the six episodes for season five — recently revealing the extreme lengths production took to ensure the details remained under lock and key 

The eldest daughter of Prince Andrew and Sarah Ferguson, Beatrice, 36, made her way to the Garrison Chapel in London's Chelsea neighbourhood, where the King's Foundation's Future Textiles exhibition is on display. 

'It did add work for every department — each department head had to become the gatekeeper for their own team. A real challenge, and a layer in the beginning, was making it fun. We started to have fun with it at the end. We joked that we should have been filming the blocking rehearsals, because the cast got into it and there was a lot of laughter. But it was all in service of protecting the story for the audience.'

'We didn't have a script coordinator; I took over that role and did the redactions for every cast member. Most of the cast only got the scenes they were in. So for a large portion of the cast, even for some of our seven-year veterans, they will be learning what happens when the show premieres,' she said.

Kelly's sexy frock featured a daring front slit that showed off her toned legs and a mesh bodice. The British star, 47, tratament pentru fire albe wore her flaming red hair in a sexy updo and made her blue eyes pop with smudged black eyeliner

For the NYC celebration, Perabo joined her Yellowstone co-stars on the red carpet ahead of a screening of the premiere episode. The Coyote Ugly star, 48, stunned by going braless under a sheer black button-up blouse

'Yes. All of that. All of the things. It was a perfect storm, really. There's so much anticipation,' Voros replied. 'There was so much in the press about Kevin. And when you make a show that has such a beloved following, everyone is going to have their ideas about how it should end.

'Typically, the department gets the scripts and they share them with everyone in their team, everything from people doing clearances to people picking paint colors,' she explained. 'So this strategy extended to not just getting scripts for actors, but also what needed to be shared within key crew and personnel to allow them to do their jobs without having to bear the weight of keeping secrets.'

The glamorous royal then swapped the glitzy bash for a dinner for cosmetics company Estée Lauder and Harrods, where she was joined by Princess Diana 's nieces, Lady Kitty Spencer, 33, and twins Lady Amelia and Lady Eliza, 32.

Pictured: Beatrice speaking to Modern Artisan graduates as she visits The King's Foundation's Future Textiles exhibition at the Garrison Chapel in London. The exhibition marks ten years of pioneering textiles education, inspired by the charity's Royal Founding President, King Charles III

The exhibition that opened last month marks the 10th anniversary of the Future Textiles programme that was launched by King Charles to bridge the skills gap within the country's textile industry through education and training. 

'There were scenes where we had a lot of extras where we shot a different version of the scene,' she said. 'We're so lucky to have so many great background artists come through the show and really make the world real for us — but you don't want 150 people in an arena to go home and tell their families what they did that day.

'You are dealing with a cast of actors who know their characters as well as Taylor does, and who have this entire lifetime of work that they have put into building these roles. The performances this year are just exceptional.'

Announcing Beatrice's pregnancy last month, a spokesperson for Buckingham Palace said: 'Her Royal Highness Princess Beatrice and Mr Edoardo Mapelli Mozzi are very pleased to announce that they are expecting their second child together in early spring; a sibling for Wolfie, aged eight, and Sienna, aged three.

'When we would do blocking rehearsals, typically the cast runs the lines and the ACs put down marks. In these blocking rehearsals, we wouldn't actually run the dialogue. The actors would move around the space, landing on their marks. But they wouldn't actually say the dialogue, and only the people in the closed set would actually see the scenes. So, it was rather cloak and dagger.'

'We had very, very closed sets. We treated every scene really as if it was a closed set, so you had the same protocols as if you had nudity on set, where it was only key personnel at the monitors,' she explained.

'I think Taylor has written something that is beautiful and surprising and unexpected and riveting. The cast this year, after seven years of shooting this show, has grown into these roles so deeply that the performances are really next level.