From a Buckingham Palace-approved wardrobe to adopting the 'duchess slant', Meghan has had to get to grips with a tough-to-navigate rule book since becoming a fully-fledged member of the royal family.
But forget swapping handbags for clutches and only wearing one type of shoe; there's one surprising act of protocol that the Duchess of Sussex possibly didn't see coming.
Royals are not allowed to eat garlic in the presence of Queen Elizabeth II.
According to Buckingham Palace chef Darren McGrady, Meghan's grandmother-in-law isn't a fan of the ingredient - and its effect on one's breath - and has banned members of the family from consuming it at state banquets.
"We can never serve anything with garlic or too much onions" Grady told the Express. "The Queen would never have garlic on the menu."
While giving up garlic may seem like an easy feat in comparison to ditching her seriously covetable collection of cross-body Strathberry bags, Meghan is a self-confessed fan of the allium.
In several pre-wedding interviews, the former Suits star expressed her love for Filipino chicken adobo which features a clove of two.
On her now-defunct blog, The Tig, the foodie wrote: "Growing up in LA, with its melting pot of vast and varied cultures, I was no stranger to the Filipino community. I can whip up a big pot of chicken adobo like it’s nobody’s business."
The couple's now-famous engagement roast chicken recipe also features a heavy dose of garlic, so we doubt Her Majesty will be popping round for dinner anytime soon.
H/T Cosmo UK