The two women – who have reportedly been feuding – will be housed in different quarters as the Royal Family celebrate Christmas together.
Prince Harry and his pregnant wife will stay with 30 or more guests at the Sandringham Estate.
While Prince William and Kate will have their own Georgian abode just two miles down the road from Sandringham House.
Interestingly, the couples stayed together last Christmas in the same pad William and his wife will occupy with their children.
Around thirty of the Royal Family will arrive at Sandringham Estate on Sunday ahead of Christmas Day.
William and Kate will reside at Anmer Hall, which has ten bedrooms, but they will not be sharing with his brother and his American wife.
They will be housed with the other guests, 'packed in like sardines', according to a source.
Many will see this as a snub to Meghan Markle who has reportedly been difficult to deal with in recent weeks.
Sources say Meghan and Kate are 'very different people' and simply 'don't get on'.
It was revealed recently that Kate was left 'in tears' after a fitting for Princess Charlotte'sbridesmaid's dress before Harry and Meghan's wedding in May.
There will be a glimpse of the couples when they visit St Mary Magdalene Church on Christmas Day.
A royal source revealed: "It will all be friendly – there is no way that you are going to be unfriendly to someone on Christmas Day,' said an insider.
"Especially when Meghan looks like she is about to have a baby at any minute. All will be smiles."
"Everybody is on parade when they go to Sandringham. This is not a family sitting around having a jolly time relaxing. "
It is understood that The Queen had invited Meghan's mom Doria Ragland to celebrate Christmas with her daughter but she will not be travelling to Great Britain.
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at firstname.lastname@example.org, or call us at (866) ON-RADAR (667-2327) any time, day or night.