British Prime Minister Boris Johnson may have taken a month to embark on his first overseas trip, but he soon felt at home when he visited the Elysee Palace, the residence of French President Emmanuel Macron on Thursday, putting his foot on a coffee table.

In video footage, Johnson was joking about photojournalists and briefly putting his foot on the coffee table at the French presidential palace, before waving to media representatives in the room.

As for President Macron's reaction, he was seen smiling after the incident, without giving any comment on Johnson's remarkable behavior.

This came after Johnson and Macron spoke to reporters in the Elysee courtyard, where he warned that there is not enough time to redraft the Brexit agreement before the deadline expires on 31 October next.

Johnson showcases French language skills to impress French officials (Getty Images)

Come up with or without agreement
Johnson, who showed his French skills to impress French diplomats, is betting on getting Britain out on time "at all costs", reaffirming his country's intention to leave the EU at the end of October, with or without an agreement. He said he wanted an agreement on Brexit and that his meeting with German Chancellor Angela Merkel encouraged him, he said.

Paris is the second leg of Johnson's first foreign trip after becoming prime minister. On Wednesday he visited Berlin and held talks with Merkel.

An EU official told reporters in Brussels today that the EU was "a little concerned based on what we heard (Wednesday) in Berlin."

But Johnson said in a statement after talks with Macron that the UK's future could only be in Europe. The Elysée Palace later said the talks were "constructive" and "comprehensive."

But Macron, who has recognized himself as the "hardest president" on Brexit, rejected Johnson's calls to abolish Ireland's "safety net".

He said the talks should be based on the exit agreement reached between the European Union and former British Prime Minister Theresa May, which was rejected by the British parliament three times.

The safety net clause seeks to avoid the return of a de facto border between the British Northern Territory and the European Union.

Johnson says the clause is "undemocratic and infringes on the sovereignty of the British state" because it requires it to continue to apply the laws of the Union during the transitional period and prevents it from pursuing an independent trade policy.