On October 12, it'll be time for another royal wedding, as Princess Eugenie is set to marry Jack Brooksbank.

And although we know the wedding won't be of similar scale to Kate or Meghan's big day, it's still a royal wedding and so, a strict dress code applies for all attendees. According to the Express, all female guests are expected to wear a hat to the wedding and this includes both the Duchess of Cambridge and the Duchess of Sussex. Aside from that, women are also expected to wear a dress while men are to wear a three-piece morning suit (which basically just means formal day attire). Princess Eugenie and her sister Beatrice are no strangers to wearing hats at royal weddings, in 2011 the pair were slammed by the public for their choice of headwear to William and Kate's nuptials. Speaking about that hat choice last month, Eugenie said: “There was a horrible article that had been written about Beatrice and she got really upset,” the 28-year-old told Vogue. And so, we expect Kate and Meghan will be taking a lesson from that controversy opting for the "less is more" approach. But hats and fancy attire aren't the only demand at Princess Eugenie's big day, speaking to British Vogue, she added that she has gone "plastic free" in her home, and wants her wedding to be the same. "My whole house is anti-plastic now–and Jack and I want our wedding to be like that as well." She'll have to stick to silver, I guess. You can read all about that here.