The Duchess of Cambridge's brother took to social media with a snapshot of his dog Ella gazing up at the camera while wearing a Union Jack bandana.
VIDEO: James Middleton shares adorable video of pet dogs
The picture, along with melting several hearts served as a tribute to Her Majesty in honor of her special Platinum Jubilee celebration.
"From one matriarch to another [crown emoji] wishing Her Majesty all the best on her special Jubilee," James wrote.
He was instantly inundated with fan comments gushing over the sweet photograph, with one saying: "Absolutely love this," and another adding: "Adorable photo - long live the queen!!!!"
A third commented: "This is just the cutest," with a fourth even writing: "How darling is this?!! Original & very sweet! I'm sure the Queen would love this because she loves dogs so very much!!"
James and his dog Ella paid tribute to the Queen
Kate was front and center at the celebration on the balcony with the monarch and other senior working royals, joined by her kids Prince George, Princess Charlotte, and Prince Louis.
Other senior royals on the balcony included Prince Charles, the Duchess of Cornwall, and the Earl and Countess of Wessex along with their children.
Earlier on, the Cambridge children joined their mum Kate in their first carriage procession as historic celebrations marking the Queen's 70-year reign began during the four-day weekend.
Cheers went up from thousands of spectators on The Mall as they caught sight of the royal kids with proud parents Kate and the Duchess of Cornwall.
His sister Kate was on the balcony with the Queen and other senior royals
George, Charlotte and Louis smiled and waved enthusiastically as they sat in a row, with Louis, the youngest, in the middle of his older siblings.
The traditional carriage procession left Buckingham Palace ahead of Trooping the Colour, also known as the Birthday Parade.
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