The Queen's Bond-babe style dive into the Olympics opening ceremony sent a ripple of shock around the globe. Even her own family were left applauding in amazement and delight.
"To be honest, we were kept completely in the dark about it. That's how big the secret was," said Prince William during a BBC interview.
In the understatement of her reign, his brother Harry added: "You don't expect the Queen to do something like that."
But at several key moments in her 60-year tenure, Her Majesty has indeed done "something like that".
With the wisdom of all good leaders, she has an antenna for when it is necessary, vital even, to move with the times.
In this special report, HELLO! Online examines the forward thinking which makes Elizabeth II a surprisingly modern monarch
It's a little princess!