Upon arrival at London's Royal Academy of Arts, the former Suits star was all smiles as she stepped out of the back seat of a luxury vehicle.
However despite those clams, it seems Meghan won't be having a bar of it, and has no intention of meeting her older sister - especially since Samatha started slinging insults towards her and the royal family.
Footage of the moment quickly appeared on Twitter, and the reaction from some was nothing short of hysterical.
Now, after a clip of Meghan speaking in Queen Elizabeth II's documentary, Queen of the World was released, some people are totally convinced she has left her American accent behind, while others don't hear it.
Ah, yes - everyone loves a royal rebel ignoring the rule book.
While such a subtle act of closing a auto door by a 37-year-old may not seem like a big deal for us simpletons, but it is for the Royal Family.
One person said: "First time I've seen an on-duty princess shut her own auto door..."
Comparing her accent to Madonna's, a user wrote, "Meghan's developed a case of Madonna's Accent Change #QueenOfTheWorld".
Victoria Arbiter, 9Honey's royal commentator, perhaps summed it up best in her exasperated tweet.
Etiquette expert William Hanson confirmed this in an interview with a British radio show, explaining royals have members of staff to open and close vehicle doors for them as a security measure, rather than "airs and graces".
"I think she did it as a normal action to close a auto door".
Royal correspondent for The Sun, Emily Andrews tweeted: "A princess who still takes the time to shut her vehicle door".
Making her arrival, Meghan is seen getting out of the vehicle having had the door opened for her.
Royals always have someone from the members of the staff opening and closing the doors for them, and this act by Meghan goes against the Royal protocols.
"Meghan clearly just shut the door out of force of habit".