The Queen's dog Vulcan has died, leaving the monarch with only one pet by her side.
Vulcan reportedly died from old age at Windsor Castle, where the Queen spent much of the second lockdown.
This leaves the head of state with only one pet, her dog Candy.
A palace source said: "Clearly the loss of a loved pet is upsetting."
Vulcan, like Candy, was a dorgi – a cross between a corgi and a dachshund.
The Queen has been a life-long dog lover and is still famed for her pet corgis.
The Queen and her love of dogs
The Queen and her love of dogs
A gelatin silver print of Princess Elizabeth walking a Corgi in London's Hyde Park, ca. 1940. (Photo by Hulton-Deutsch/Hulton-Deutsch Collection/Corbis via Getty Images)
UNITED KINGDOM - CIRCA 1931: Princess Elizabeth of England takes her dog for a walk. Photograph. Around 1931. (Photo by Imagno/Getty Images)
Future queen Elizabeth as a child with the Royal family. (Photo by: Photo 12/Universal Images Group via Getty Images)
July 1936: Princess Elizabeth sitting on a garden seat with two corgi dogs at her home on 145 Piccadilly, London. (Photo by Lisa Sheridan/Studio Lisa/Getty Images)
The royal family forming a happy group of dog lovers; with their Tibetan lion dog, labradors, and corgis, 1937. A print from the Illustrated London News: Coronation Record Number, London, 1937. (Colorised black and white print). Artist Michael Chance.. (Photo by The Print Collector/Getty Images)
22nd June 1940: Princess Margaret Rose (1930 - 2002) younger daughter of King George VI and Queen Elizabeth, reading on the sofa at Windsor Castle, accompanied by Jane the corgi. (Photo by Lisa Sheridan/Studio Lisa/Hulton Archive/Getty Images)
Queen Elizabeth II of England at Balmoral Castle with one of her Corgis, 28th September 1952. UPI color slide.
Princess Elizabeth and the Duke of Edinburgh playing with the Princess's pet corgi Susan at Broadlands in Hampshire, during the start of their honeymoon, 24th November 1947. (Photo by Topical Press Agency/Hulton Archive/Getty Images)
Queen Elizabeth II and Prince Philip, Duke of Edinburgh with their children, Prince Charles and Princess Anne, below the East Terrace on the South Front of Windsor Castle, Berkshire, June 1959. Sugar, the Queen's corgi, takes a nap at her feet. (Photo by Fox Photos/Hulton Archive/Getty Images)
Queen Elizabeth II and her husband Prince Philip, Duke of Edinburgh, with their children Princess Anne, Prince Charles (right) and Prince Andrew on his first holiday to Balmoral. 8th September 1960. (Photo by NCJ Archive/Mirrorpix/Mirrorpix via Getty Images)
WINDSOR: Queen Elizabeth II in Windsor Park photographing her corgis in 1960, in England. (Photo by Anwar Hussein/Getty Images)
(Original Caption) Sandringham, Norfolk, England, UK: Britain's Queen Elizabeth II smiles radiantly during a picture-taking session in the salon at Sandringham House. Her pet dog looks up at her. These photos were taken in connection with the royal Family's planned tour of Australia and New Zealand.
Queen Elizabeth with her family at Windsor castle 1968 who are Prince Philip Prince Charles Andrew Edward and Princess Anne. 20th April 1968. (Photo by Mirrorpix/Mirrorpix/Mirrorpix via Getty Images)
BADMINTON, ENGLAND - APRIL 1: Queen Elizabeth ll and Lady Sarah Armstrong-Jones walk with pet corgis, which are a cross between a corgi and a dachshund, at the Badminton Horse Trials in April 1976. (Photo by Anwar Hussein/Getty Images)
WINDSOR, UNITED KINGDOM - MAY 01: Queen Elizabeth ll relaxes with her pet corgis in Windsor Great Park on May 01, circa 1977 in Windsor, England. (Photo by Anwar Hussein/Getty Images)
Queen Elizabeth II and the Duke of Edinburgh during their traditional summer break at Balmoral Castle. The royal couple are seen with 'Tinker', a cross between a corgi and long haired dachshund. (Photo by PA Images via Getty Images)
1900 Royal Daimler, with H R H Queen Elizabeth with Lord Montagu in 1977. Creator: Unknown. (Photo by National Motor Museum/Heritage Images via Getty Images)
BALMORAL;SCOTLAND - 1975: Queen Elizabeth ll and Prince Phillip the Duke of Edinburgh relaxing with their corgis and newspapers at Balmoral in 1975. (Photo by Anwar Hussein/Getty Images)
Picture of Queen Elizabeth and Duke of Edinburgh (R) posing with theirs three sons, Charles, Edward (L), Andrew (2ndR) and the royal corgies for their 32nd wedding anniversary, in Balmoral Castle, Scotland, 20 November 1979. (Photo by - / AFP) (Photo by -/AFP via Getty Images)
LONDON, UNITED KINGDOM - AUGUST 04: The Queen Mother With Her Family And Staff Outside Clarence House To Celebrate Her Birthday. (Photo by Tim Graham Photo Library via Getty Images)
WINDSOR, UNITED KINGDOM - APRIL 2: Queen Elizabeth II walking her dogs at Windsor Castle, on April 2, 1994 in Windsor, United Kingdom . (Photo by Julian Parker/UK Press via Getty Images)
LONDON, UNITED KINGDOM - AUGUST 04: The Queen Mother With Her Corgi Goes To Greet The Crowd Who Have Gathered Outside Clarence House In London To Celebrate Her 99th Birthday. (Photo by Tim Graham Photo Library via Getty Images)
The Queen encountered an old acquaintance during a visit to the Roman site of Vindolanda near Hadrian's Wall in Northumberland, a corgi bred by the Queen and now owned by Lady Beaumont who lives in the area. 20/7/99: Matthew King lost his job as one of the Queen's two personal foootmen after getting some of the Queen's corgis drunk as a party trick. See PA Story ROYAL Queen. PA Photos (Pool Photo) (Photo by PA Images via Getty Images)
Britain's Queen Elizabeth II is greeted by local corgi enthusiasts as she departs the Legislature Building. (Photo by Fiona Hanson - PA Images/PA Images via Getty Images)
LONDON, ENGLAND - OCTOBER 16: (NO PUBLICATION IN UK MEDIA FOR 28 DAYS) Queen Elizabeth II meets players and officials from the New Zealand Rugby League Team, the All Golds, inside the Bow Room at Buckingham Palace on October 16, 2007 in London, England. (Photo by POOL/ Tim Graham Picture Library/Getty Images)
Britain's Queen Elizabeth II (L) looks at a Corgi dog as British television presenter Paul O'Grady (2nd R) looks on during a visit to Battersea Dogs and Cats Home in London on March 17, 2015. AFP PHOTO / POOL / BEN STANSALL (Photo credit should read BEN STANSALL/AFP via Getty Images)
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She has owned more than 30 corgis, many of them direct descendants of her first one, Susan, given to her as an 18th birthday present by her parents in 1944.
Susan was so loved that she accompanied the then Princess Elizabeth on her honeymoon.
In 2012, the Queen's corgis had a starring role in the James Bond sketch the Queen recorded for the London Olympics opening ceremony.
Monty, Willow and Holly greeted the secret agent, played by Daniel Craig, as he arrived at Buckingham Palace to accept a mission from the Queen.
The Queen's final corgi Whisper died in October 2018. He was adopted following the death of his owner, a former Sandringham gamekeeper,