Prince Harry was reportedly barefoot when he stressed the importance of tackling climate change at a mysterious Google summit last night - attended by celebs who arrived on more than 100 private planes.
The Duke of Sussex, 34, is said to have showed up at the three-day event to address a 200-strong crowd of A-listers and millionaires in Sicily, Italy.
The royal recently told how and he and Meghan Markle plan to have no more than two kids to help sustain the environment.
And he reportedly echoed these thoughts at Google's summit in an impassioned lecture.
But there have been accusations of hypocrisy for the stars who turned up in less than environmentally friendly ways.
Speaking before the event, one attendee told the New York Post: "There will likely be discussions about online privacy, politics, human rights, and of course, the environment, which makes it highly ironic that this event requires 114 private jets to happen."
The fuel-guzzling planes landed at Palermo Airport for the conference, local media reports.
Other millionaires are said to have arrived on enormous yachts.
Larry Page and Sergey Brin, who co-founded Google, reportedly created the conference to discuss various issues, including climate change.
They invited the world's wealthiest business leaders and tech gurus.
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When Harry told ethologist Dr Jane Goodall, 85, of his family plans in a British Vogue interview, it caused mixed reaction.
"I think, weirdly, because of the people that I’ve met and the places that I’ve been fortunate enough to go to, I’ve always had a connection and a love for nature. I view it differently now, without question," the duke said.
"I’ve always wanted to try and ensure that, even before having a child and hoping to have children...
"Two, maximum!"
Brother Prince William and wife Kate Middleton have three children but Harry welcomed his first baby, Archie, in May.
Harry added: "I always think to myself, whenever there’s another natural disaster, a huge increase in volcano eruptions or earthquakes or flooding, how many clues does nature have to give us before we actually learn, or wake ourselves up to the damage and the destruction that we’re causing?"
And Meghan, 37, guest edits this edition of British Vogue.