Queen Elizabeth, 89 years old and unflappable after 63 years of running the British monarchy, gave the royal equivalent of a wink at handsome young Canadian prime minister Justin Trudeau on Friday.

In a three-line toast before a meeting of the Commonwealth — countries that were part of the British Empire before they became independent, and retain the Queen as nominal head of state — the Queen singled out Trudeau, 43, for some playful banter.

The dashing Trudeau had toasted the Queen — in a long speech full of syrupy praise — and pointed out that his father Pierre was the fourth Canadian prime minister during her reign, and Trudeau himself the 12th.

The Queen nimbly disarmed Trudeau's flattery with a response that was brief, dry and somehow affectionate.

Trudeau, wise if still young, knew that it wouldn't do to let that stand.

With a chivalrous sweep of his cape and a deep bow (we like to think), Trudeau replied with courtier-like reflexes that the Queen was "forever young."

On the contrary, you are forever young. I was honoured to toast your lifetime of service tonight. https://t.co/xcXGiSj6OT — Justin Trudeau (@JustinTrudeau) November 27, 2015

Nice save, Mr. Trudeau.

So far Prince Philip seems unconcerned, but he may want to keep an eye on the situation.