Crown Princess Mary of Denmark has tested positive for COVID-19, the Danish royal household has announced.
Explaining the situation in a statement, the palace said: "The Crown Princess has today, Wednesday 15 December 2021, tested positive for COVID-19. Her Royal Highness remains in isolation in Frederik VIII's Palace at Amalienborg."
The princess is currently the only royal who has tested positive for the virus, however no details were given about her condition.
She is understood to be isolating away from her husband, Prince Frederik, and their four children in line with Danish COVID-19 regulations.
Current rules require Mary to spend 10 days in isolation, meaning she should be allowed to reunite with her children for Christmas Day.
Her eldest, Prince Christian, 16, has been away from the family at a prestigious Danish boarding school since August and will be eager to see his mother again for the holidays.
He will know how his mother is feeling right now, having tested positive for COVID-19 himself back in December of 2020.
His infection was linked to an outbreak at the school he was attending at the time, and he returned home to isolate with his family at their home – Frederik VIII's Palace in Copenhagen.
Mary and Frederik's three younger children - Princess Isabella, 14, and twins Prince Vincent and Princess Josephine, 10 – have not contracted the virus and will be kept away from their mother while she isolates at home.
It's a sad development for the Danish royals, who have faced several setbacks due to the coronavirus pandemic over the last two years.
The family – Mary, Frederik and their children in particular – had been making the most of their return to in-person events after multiple stints in lockdown.
More recently, the royals were forced to cancel their annual holiday events scheduled for New Year's Day due to the ongoing coronavirus situation.
Now, it looks like Mary will be unable to enjoy any of the traditional festivities leading up to Christmas, though other royals are expected to continue their duties.
Prince Frederik is expected to continue attending public events while his wife isolates, and the couple's children have been taking on a larger public role over the last 12 months.
Just last month, Mary stepped out with her youngest children, twins Vincent and Josephine, to attend the traditional Hubertus hunt, a special event hosted on the first Sunday of November each year.
The children were all smiles as they rugged up against the chill to greet the crowds with their mother, who smiled proudly as her twins waved to onlookers.
Now, it looks like we won't be seeing the Australian-born princess in public again until after Christmas.
It's possible we may be treated to photos from inside the palace on Christmas Day, as Mary and her family enjoy the festivities, and we may seen an annual Christmas portrait - though any such photo would likely have been taken before Mary's diagnosis.