Europe has a lot riding on Macron's diplo matic performance. So far, it appears, so good.
Macron struck up an unusually chummy rapport in his first meetings with Trump, winning a handshake contest and the US leader's cellphone number, despite their stark political differences.
German Chancellor Angela Merkel, too, is warming to the energetic Macron they've already met three times in the two weeks since Macron took office and is pinning hopes on him to boost Europe's economy and unity.
During his very first days in office, he visited Berlin and a French military base in Mali, where the country's troops are fighting Islamic extremism. Then over this past week, he cemented his status as a new global player at a NATO summit in Brussels and a Group of Seven summit in Italy.
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While he has never held elected office before, Macron was helped by his comfortable English and backstage knowledge of international summits gained as top economic adviser to predecessor Francois Hollande from 2012 to 2014, then as his economy minister.
The most symbolic image was his handshake with Trump at their first meeting, in Brussels. After some friendly chatter, the two gripped each other's hands so tightly before the cameras that their jaws seemed to clench.
It looked like Trump was ready to pull away first, but Macron wasn't quite ready to disengage.
The next day at the G-7 summit in Sicily, Macron attracted attention for his friendly interactions with Canadian Prime Minister Justin Trudeau.
At their bilateral meeting, Macron, 39, and Trudeau, 45, went on a terrace overlooking the Mediterranean Sea, were they posed for photographers, surrounded by flowers.
Germany is hoping Macron jumpstarts France's economy, a pillar of European unity and the shared euro currency.
British Prime Minister Theresa May was visibly touched when Macron addressed his condolences in English following the Manchester attack that killed 22 people.
"We were very shocked, because ... We know how this can hurt the people of your country, but more generally for Europe. Because they attack our young, and very young people," Macron told her.
Macron has promised to discuss the Syria crisis on Monday with Russia's president when he visits the royal palace in Versailles. That may be Macron's toughest test so far, amid tensions over Moscow's role in fighting in Syria and Ukraine, and after Putin openly supported rival French candidate Marine Le Pen of the far-right National Front party.
On Syria, where extremists plotted attacks against France and where Europe's migrant crisis began, he said, "I said at the G-7 table that I don't regard it as a collective victory that on Syria ... Not one of us was capable of being around the table. You have Russia, Iran and Turkey. That is a defeat."
"So we must talk to Russia to change the framework for getting out of the military crisis in Syria and to build a much more collective and integrated inclusive political solution," he added.