Catherine, Princess of Wales and the Canadian Prime Minister Justin Trudeau have been friendly for a while.

During that trip, William and Kate visited Vancouver without their kids.

Justin and his then-wife, Sophie Gregoire Trudeau, went with the royals for a series of engagements.

Kate Middleton, Prince William, Justin Trudeau smiling

However, one snapshot from that meeting went semi-viral.

In the photo, Kate is seen smiling broadly at Justin while brushing hair off her face.

The event had many world leaders and others connected to NATO in attendance, along with British royals.

Justin Trudeau Kate Middleton smiling, walking

Kate Middleton was at the event without Prince William, due to him being on a trip.

Regardless, the duo looked thrilled to be reunited once more.

On behalf of Canadians, I’m sending my support as she undergoes treatment.

Split image of Justin Trudeau and Kate Middleton

We’re all wishing her a swift recovery."

Trudeau has been publicly supportive of the royal family in times of crisis before too.

No doubt the colleagues perhaps more like friends will have much to discuss.