The service is a regular date in the royal calendar and commemorates Henry van Straubenzee, a childhood friend of Harry's who died in a auto crash aged 18 in 2002.
The Sussexes will sleep over at Anmer Hall - just like they did past year - when all the royals head to Sandringham over the festival period.
And, to add to this, Harry and Meghan's long-term move out of Kensington Palace, to Frogmore Hall on the Windsor Estate, was slated by some to be due to be thanks to the arguments between Meghan and Kate!
Dozens of Caravan Migrants Scale Border Wall and Cross into U.S.
McAleenan has been overseeing the US southern border where more than 7,000 migrants have gathered near Tijuana, Mexico . About two dozen migrants climbed over the border wall separating Mexico from the United States near Tijuana on Monday.
The latest news comes after reports last week suggested Harry thought William wasn't doing enough to welcome his then-wife-to-be into the family last Christmas.
Kate wowed in a pale floor-length Jenny Packham gown with subtle sequin embellishments and organza short sleeves, as she arrived at the white-tie bash with husband William.
The palace usually does not comment on gossip stories regarding any members of the royal family.
She is the actress who inspired Meghan Markle to get into the industry. "Absolutely!" she said in a video captured by a fan, after someone asked whether she was excited about the pregnancy. However, two guests were notably absent from the festivities: Prince George and Princess Charlotte. And a cousin for George and Charlotte, as well, and Louis.