Queen's brilliant reaction to seeing cows is one of her most iconic moments

As we mourn the loss of the Queen, one of her most brilliant moments has resurfaced. Watch below:

One such memory was of her delightful reaction to cows being paraded as part of her 90th birthday celebrations back in 2016.

The Queen, whose expression typically took a graceful, if professional mode, looked ecstatic as some Jersey and Red Sussex cows came past her.

In delight, the late monarch turned to her husband Prince Phillip to share the moment.

And now the clip has resurfaced on Twitter, with users promptly reacting to Her Majesty's love of cows, one said: "Love this. I also get this excited when I see cows haha."

Another speculated what the Queen might've said in that viral moment: "Stop talking to me, the cows are coming. This is one of the many reasons why this lady was simply the BEST!"

A third added: "Oh my god, this was one of the best things ever. Can't believe she reacted like that when she saw the cow they had brought to show her. Absolutely amazing."

Others thanked the Queen for her service after seeing the clip: "Look at her face light up bless her.. rip Elizabeth thank you for your service angel."

The country is in mourning today following the tragic news that Britain's longest serving monarch had died.

King Charles paid a heartfelt tribute to his mother, saying: "The death of my beloved Mother, Her Majesty The Queen, is a moment of the greatest sadness for me and all members of my family.

"We mourn profoundly the loss of a cherished sovereign and a much-loved Mother.

"I know her loss will be deeply felt throughout the country, the Realms and the Commonwealth, and by countless people around the world."

He went on to add: "During this period of mourning and change, my family and I will be comforted and sustained by our knowledge of the respect and deep affection in which The Queen was so widely held."