Although this particular dinner at the Norfolk estate is an annual event, many royal insiders note the significance of the "thoughtful gesture" - Her Majesty has never extended an offer like this before, not even to Prince William's in-laws, the Middletons.
The source added: "Queen Elizabeth is very aware of all the problems Meghan has had with her dad and sister and she feels sorry for her that she doesn't have family and a support network close by".
Doria's composure during the Duke and Duchess of Sussex's wedding back in May left a lasting impression on the Queen, especially in the midst of all the drama surrounding Meghan's father, Thomas Markle.
Middleton School Teachers in Hot Seat for Halloween Costumes
Faculty at the elementary school reportedly held a costume competition that involved dressing up to represent various countries. The photos were taken down from the Facebook page , but once screenshots began to circulate, the backlash began.
A spokesperson for Buckingham Palace declined to comment.
Mr Markle pulled out because of health problems just days before she was due to walk down the aisle and admitted he had staged paparazzi pictures.
He later said he had apologised to both Harry and Meghan and denied staging the shots for money, insisting they were taken in a bid to "change his image".
Doria was also in London in September and joined her daughter at an outdoor reception at Kensington Palace to mark the launch of a cookbook.
Newly married couple killed in helicopter crash after wedding reception
According to the National Transportation Safety Board, the accident involved a Bell 206B - a two-bladed twin-engine helicopter. The Uvalde County Sheriff's Office said a call about a possible downed aircraft came in around midnight.
The duchess, who worked with Grenfell campaigners on the book, Together, said it had been a "labour of love".
She reportedly said she was "head over heels" with pride as Meghan helped prepare lunch for guests.
Meghan Markle and Prince Harry's first holiday as a married couple is sure to be a memorable one.
Coroner cites 'mixed toxicity' for rapper Mac Miller's death
According to the investigator's report, McCormick's personal assistant discovered him unresponsive in his bedroom and called 911. A bottle of prescription pills was also found in his bathroom, including Xanax, Oxycodone, Hydrocodone, and generic Adderall.