Queen Elizabeth is a stickler for tradition.
So it came as more than a surprise to royal fans when Her Majesty broke her own protocol during her annual garden party at Buckingham Palace on Thursday.
WATCH this video to see the incredible moment no one could quite believe!
Among the thousands of guests invited to the soiree was Northern Irish blogger and mother-of-two Laura-Ann Barr, who managed to catch the monarch's attention with a delicate bouquet of flowers, Hello! Magazine reports.
The floral arrangement matched the Queen's powder pink ensemble to perfection, with the filler flowers a carbon copy of the ornate design on her hat.
Queen Elizabeth shocked her attendants by stopping to accept the bouquet, something her security detail revealed has never happened before.
The historic moment was captured by Laura-Ann's mother and has since gone viral, with Laura-Ann admitting the experience was "surreal".
She told Hello! she decided to bring the bouquet because she only had "one chance of meeting the Queen", but was informed by security at the Palace gates that Her Majesty would not accept them due to protocol.
"I think they were very shocked when it happened!" Laura-Ann admitted.
"She smiled so warmly at me and thanked me very much. There were 8,000 people there and I honestly couldn't believe my luck.
"I curtsied and loudly said, 'Your Majesty I have some flowers for you'. Once I spoke and curtsied I don't think she could have walked past me, everyone was watching and everyone heard it! I told her she looked beautiful in pink and she smiled again."
The daughters of Prince Andrew and Sarah Ferguson looked chic in summery ensembles, with Beatrice the picture of modern elegance in a deep hued floral dress by up and coming designer The Vampire's Wife.
Younger sister Eugenie chose a nude dress by Parisian brand Sandro which she paired with her favourite silver Valentino Rockstud stilettos.