On October 12, Princess Eugenie will marry Jack Brooksbank at St. George鈥檚 Chapel in Windsor 鈥 the same church where her cousin Prince Harry married Meghan Markle in May. And in a rare interview with British Vogue, the bride-to-be revealed that she has chosen her older sister, Princess Beatrice, as her maid of honor.

鈥淓uge is amazing,鈥 Beatrice said of her sibling, noting that the younger royal is 鈥渁 very modern bride鈥 who uses Pinterest to look for wedding cake ideas and is banning plastic from her big day. (鈥淢y whole house is anti-plastic now and Jack and I want our wedding to be like that as well,鈥 Eugenie told Vogue.)

The princess admitted that she finds wedding planning 鈥渧ery nerve-wracking because you want it to be perfect,鈥 but said she鈥檚 鈥渘ot stressed at all鈥 because 鈥測ou realize that you鈥檙e going to be with the person you love forever and nothing else really matters.鈥

Which is not to say it鈥檚 been easy. Having a relationship in the spotlight 鈥 or doing anything in the spotlight, really 鈥 has been a learning experience for both Eugenie, a director at the London art gallery Hauser & Wirth, and her sister Beatrice, who works for Afiniti, a US-based technology company.

鈥淚t鈥檚 hard to navigate situations like these because there is no precedent, there is no protocol,鈥 Beatrice explained to Vogue. 鈥淲e are the first: We are young women trying to build careers and have personal lives, and we鈥檙e also princesses and doing all of this in the public eye.鈥

In part because of that, they鈥檝e become 鈥渆ach other鈥檚 rocks鈥 in times of scrutiny or ridicule. 鈥淭here was a horrible article that had been written about Beatrice and she got really upset,鈥 Eugenie recalled to Vogue (via People). 鈥淲e were just about to step out [at a Buckingham Palace garden party] and she had a bit of a wobble and cried. I was looking after her. And then about an hour later, I had a wobble and started crying and Bea was there for me.鈥

Fortunately for Eugenie, Beatrice will be there for her on her wedding day, too 鈥 although we have to imagine that any tears they cry then will be tears of joy.

Do you have someone in your life you can lean on the way Princess Eugenie and Princess Beatrice lean on each other? Let us know @BritandCo!

(photo via Chris Jackson/Getty Images + Jonathan Brady/WPA Pool/Getty Images)