With foreign support and internal stability maintained, it appears MBS and King Salman have weathered the storm that followed Jamal Khashoggi's killing, reducing the immediate likelihood of MBS's removal.
"Don't worry", Prince Mohammed is heard saying in English to the French leader, who responds, "I do worry".
The French presidency said that Macron spoke to the prince about the killing of Khashoggi and the Saudi-led offensive in Yemen, where millions are on the brink of starvation in what the United Nations calls the world's worst humanitarian crisis.
Putin and the Crown Prince are slated to meet during the annual gathering to talk about Khashoggi's murder and oil production.
HOT MIC: French President Macron Caught LECTURING Saudi Prince at G-20
The Saudi Gazette newspaper posted a video of the meeting online, showing the two speaking in hushed tones with their heads close together, Macron looking the crown prince in the eye and Mohammed bin Salman nodding his head and at times smiling.
The two leaders met as a part of the G20 summit in the Argentinian capital Buenos Aries.
Another French official said Macron confronted bin Salman as soon as he saw him enter, calculating that it was better to address his concerns than to ignore them or shun the prince. "No I will listen of course", bin Salman said in English, then bursting into a laugh.
Saudi Crown Prince Mohammed bin Salman showed himself to be no pariah Friday (Nov 30) at the G-20 summit, with a beaming Vladimir Putin welcoming him but European leaders warning him over the killing of a dissident journalist.
Macron, undeterred and continuing on with the conversation, later says, "I'm a man of my word".
The BBC's political editor Laura Kuenssberg wrote on Twitter that 'The Prime Minister stressed the importance of ensuring that those responsible for the appalling murder of Jamal Khashoggi are held to account'.
After initially denying the murder, Saudi Arabia has acknowledged Khashoggi was killed inside the consulate but blamed his death on a "rogue" operation.
G20 powers opened two days of summit talks, after a stormy buildup dominated by tensions with Russian Federation and US President Donald Trump's combative stance on trade and climate fears.
There were also warm handshakes for the crown prince from President Trump and his daughter Ivanka on the first day of a summit where some had hoped he would be treated as a pariah.
The two will likely find common ground in that the Russian leader has also been put under increasing pressure from Western countries in recent days.
A White House official confirmed the two exchanged pleasantries during a leaders' session.