Photos have also been released showing the 53-year-old writer and Phillips handing over the letter to palace security, as well as photos of her with her newly acquired party masks.
Freakish pictures show Samantha clutching a Harry mask that she bought from a souvenir shop after refusing to leave the Royal area.
However, it's believed that she was turned away from security, more on that here, and since then she's been sharing her thoughts about the whole situation on social media.
After many failed attempts at getting in touch with Meghan, Samantha made a decision to come to London to confront her about a few things on her mind.
The 53-year-old's publicist announced the news on Twitter last month and said: "Samantha is coming to the United Kingdom this week, like it or not".
The source told the Mirror: "This is the closest Meghan has come physically to that side of her family since she married into the royal family but palace staff had clearly been instructed not to allow her access".
And according to royal etiquette specialist Myka Meier, Harry and Meghan's cute handholds and loving embraces are what make them approachable to non-royals.
Markle had arrived in London a week earlier in an attempt to extend "an olive branch" to her sister, following the family feud that has rocked headlines for months, dating as far back as even before the May 19th royal wedding. Samantha, who suffers from multiple sclerosis, was pushed by her partner in a wheelchair through an open gate.
Some of her comments seem a bit weird though and it's hard to figure out what exactly is going on especially after she apologised to Meghan during an appearance on The Jeremy Vine Show last week.
"I wish things could be different", she said.