Kate MIidleton and Meghan Markle have to follow Queen Elizabeth II’s odd fashion rules.

The Duchess of Cambridge and Duchess of Sussex are among the most popular women when it comes to fashion. Although they have their own style, Middleton and Markle still need to stick to the monarch’s unwritten rules when it comes to dressing up especially during flights.

Emily Andrews revealed on Channel 5’s documentary “Secrets of the Royal Flight” that the Queen wants female royals to wear tights. She also has an odd fashion rule and that’s for them to look perfect.

“They have to look perfect,” royal photographer Ian Pelham Turner added. “As if they were on the front cover of Vogue, and that’s how they consider things.”

Andrews also shared a crucial detail about Middleton’s dresses when the duchess travels. According to her, Middleton has a seat for each of her dresses when flying.

“Obviously when we go to the airports, especially when it’s hand luggage only, we’re trying to cram all our toiletries into that plastic bag,” Edwards added. “It’s never big enough. No, the royals don’t have to worry about anything like that. I’ve been on a plane where all Kate’s dresses had their own seat, to make sure they were kept flat. They are not going to be shoved in the hole just to be squashed by everyone else’s.”

Middleton and Markle also uses a unique strategy to avoid the embarrassing Marilyn Monroe moments. According to Myka Meier, founder of Beaumont Etiquette, they wear body suits and clothes that increases static so it’s much harder for their dresses to fly up.

Also, heavier fabrics are recommended for runaway appearances. They also wear hats to keep their hair in place. These are among the royals’ secret to have a picture perfect look when it’s windy.

Queen Elizabeth II has her own strategy in keeping her dresses hang beautifully. Instead of wearing body suits, she simply add a couple of weights into their hemline.

kate, queen and meghan Pictured is Catherine, Duchess of Cambridge (left), Queen Elizabeth II (center) and Meghan, Duchess of Sussex (right). Photo: Chris Jackson/Christopher Furlong/John Stilwell WPA Pool/Getty Images