A source close to the family says that the invitation is a "mark of [the Queen's] respect" for Meghan, an acknowledgement that she doesn't have any family in England.
A source added: "She has never been asked to join the royal household for Christmas, and she would love to be regarded as part of the royal family".
Xi pledges to 'step up' opening China's markets as criticism grows
"We can't let the CEOs of European companies in China to set up their businesses on a foundation of hope that reform will come". Louis Kuijs, head of Asia economics at Oxford Economics, said the speech was meaningful, if short on fresh initiatives.
And now the social worker looks set to attend Christmas celebrations at Sandringham after the Queen invited her to stay. "She has been to Meghan and Harry's home in the Cotswolds several times and she has stayed with them at Nottingham Cottage".
Meghan - who is thought to be around four months pregnant - wore the striking outfit during a walkabout in Rotorua on her last day in New Zealand with her husband.
The royal family reportedly exchanges gifts on Christmas Eve, though extravagant presents aren't in the cards here.
The Duchess of Sussex and her mother reportedly speak on the phone everyday and a move to the United Kingdom could be on the cards with Meghan's royal baby on the way.
On Christmas Day, the family attends Christmas services at St. Mary Magdalene church, which are followed by a Christmas Day meal featuring a Norfolk turkey as the main attraction.