It appears people in America aren't the only ones talking about President Donald Trump behind his back. World leaders in London during the NATO Summit were caught red-handed talking about America's leader on Tuesday, according to CNN.

Canada's Prime Minister Justin Trudeau was joined by U.K. Prime Minister Boris Johnson, French President Emmanuel Macron and Princess Anne for a conversation that seemed to be centered around Trump at a reception at the Buckingham Palace.

Canadian Broadcasting Company (CBC) shared the video of the conversation on Twitter which has since made its rounds on social media.

In the brief 25-second clip, Johnson can be heard asking Macron why he was late.

"Is that why you were late?" Johnson asked.

"He was late because he takes a … 40-minute press conference at the top," Trudeau interrupted.

Prior to the reception, the president had called an impromptu conference and although his name wasn't explicitly mentioned, assumptions were made that the conversation was about him, Fox News reported.

Trudeau later admitted during a press conference on Wednesday that he was indeed talking about the president.

"Last night I made reference to the fact that there was an unscheduled press conference before my meeting with President Trump. I was happy to be part of it but it was certainly notable," he said.

At the end of the clip, Trudeau can also be heard saying, "You just watched his team's jaws drop to the floor."

Trudeau said the comment was referring to the president's announcement about hosting the G7 summit at Camp David. 

"Every different leader has teams who now and then [had] jaws drop at unscheduled surprises, like that video for itself, for example," he said.

Despite his comments, the Canadian leader said he wasn't concerned about it interfering with the country's relationship with the U.S.

Trump, however, may have thought otherwise. During a bilateral meeting with German Chancellor Angela Merkel, he referred to Trudeau as "two-faced." Trump implied that the prime minister had some ill feelings toward him criticizing Canada for not meeting NATO's 2% defense spending budget, according to CNN.

"The truth is I called him out on the fact that he's not paying 2% and I guess he's not very happy about it," Trump said, adding that Canada "has money."

"I can imagine he's not that happy, but that's the way it is," Trump said.

Johnson said it was "nonsense" to believe the conversation was about Trump. 

"I don't know where that's come from," he said during a press conference.