Buckingham Palace shares heartbreaking news as Prince Harry leaves US

King Charles III's office has released a heartfelt video to mourn the death of Queen Camilla's 'much-loved companion'.

King Charles and Queen Camilla broke the "sad" news on the royal family's official social media accounts with a heart-wrenching note.

In the video, which comes hours after Prince Harry's arrival in Canada amid speculations about his future in the US, Queen Camilla is seen performing royal duty with the help of her beloved dog.

The Palace wrote along side the video: "The Queen’s much-loved companion from @Battersea Dogs and Cats Home who brought such joy, whether on walkies, helping on official duties, or curled up by the fire."

The sad news comes after Prince Harry made a surprise appearance in Canadian to promote his Invictus Games without his wife Meghan Markle, sparking speculations about his future with Meghan and his country.