Queen Margrethe has been admitted to hospital, the Danish royal palace confirmed on Thursday.
It comes after the former Danish monarch, 85, was forced to cancel a public engagement in Hellerup.
The palace said in a statement: "As a result of the cold HM Queen Margrethe has contracted, it has been decided that the Queen will be admitted to Rigshospitalet for observation as a precaution."
Margrethe had been due to take part in celebrations for the 125th anniversary of the Sankt Lukas Foundation Thursday morning. The Foundation provides health and welfare services in Denmark.
Queen Margrethe, who abdicated in January 2024, in favour of her son Frederik, was last seen publicly last Sunday as the royals attended the memorial service for the commemoration of the 80th anniversary of Denmark's liberation, at Ryvangen Memorial Park in Copenhagen.
Health Issues
On 22 February 2023, Margrethe underwent "major back surgery" and was placed on sick leave until her birthday on 16 April that year.
Since her surgery, she has been seen using a walking stick on a number of occasions.
In September 2024, she was also hospitalised after a fall at Fredensborg Castle.
Milestone birthday
Margrethe marked her 85th birthday on 16 April, with family members joining her at Fredensborg Palace to celebrate.
King Frederik, Queen Mary and their four children, Crown Prince Christian, 19, Princess Isabella, 18, and 14-year-old twins, Prince Vincent and Princess Josephine were all pictured alongside Margrethe as she stepped out to wave to the public.
Prince Joachim's sons, Count Nikolai, 25, and Count Felix, 22, also joined their grandmother for the family celebrations, along with Margrethe's beloved sisters, Princess Benedikte, 80, and Queen Anne-Marie of Greece, 78.
Royal tradition
On Wednesday, Queen Mary and King Frederik continued a centuries-old Danish royal tradition as they boarded the Royal Yacht Dannebrog for the first time to mark the beginning of a new sailing season.
Mary, 53, looked elegant in a nautical-themed outfit for the occasion, comprising a blue floral Erdem midi dress and a navy Scanlan Theodore jacket with a wide-brimmed hat.
She later ditched the jacket and swapped her taupe heels for a powder blue style as she and Frederik held a dinner at Kronborg Castle in honour of Denmark hosting the UN Chief Executives Board meeting.
The royal couple will carry out a late summer cruise from 25 to 28 August, which will see them start their trip at the Frederikshavn Municipality on the island of Jutland.