If you're wondering why Meghan Markle and Kate Middleton's skirts never fly up, you might want to adopt this handy fashion tip.

Sam Shaw shot the famous "flying skirt" image as his friend Marilyn Monroe was filming a scene on Lexington Avenue at 52nd Street.

Marilyn Monroe's iconic flying white skirt has a rather tragic backstory. It ultimately led to her divorce from Joe DiMaggio.

But the royals have a fashion trick to keep their skirts from flying up, and after you hear the simple move you won't be able to leave the house without copying it.