Meghan Markle can't wear this in public (even if she's pregnant)

Even though it's been over two months since Meghan Markle married Prince Harry in Windsor, she's still learning all the rules she has to abide by as a Royal. For example, the fact she can't eat shellfish or that she has to return most of her birthday presents.

And of course, there are plenty of style rules too, from wearing tights at official engagements to avoiding wedges altogether. Now it turns out there's something else she can never wear in public, and it's a bit of a staple if you're a little under the weather or just want to feel comfortable, which is why it's a favourite with a lot of pregnant women.

You see protocol dictates that royals aren't allowed to wear a tracksuit in public, or any other type of baggy clothing or leggings.

The Duchess of Sussex has to make sure she always looks the part when out and about on official engagements, and that often includes a smart dress, tights and heels, and possibly a hat too.

However, it's worth noting that Kate Middleton did break that rule a couple of times, more recently when she was pregnant with Prince Louis. She wore a tracksuit and trainers at the Lawn Tennis Association last year, but as she was coaching children for a game, those were special circumstances.

You'll be pleased to hear thought that behind closed doors, Meghan can lounge around in yoga gear and binge on a takeaway if she wishes too.