Prince William plans to participate in the United Nations climate conference in South America in the coming weeks, according to the royal household.
The father and son duo appeared together on Thursday evening at a reception leading up to the climate summit, which is set to be held in the Amazonian city of Belem.
Father and son were participating in the museum gathering, marking an unusual joint appearance at a environmental conference preliminary meeting organized in partnership with the British authorities.
The King has been a long-time champion of biodiversity preservation - and Prince William has inherited the mission, with his own environmental prize initiative, which will be taking place in South America ahead of the climate conference.
Official representatives have described the Prince's participation at the upcoming climate summit as stepping up an crucial position in "environmental negotiations".
The monarch and his heir, arriving together in the royal vehicle, were welcomed participants featuring conservation experts, scientists, environmental activists, foreign representatives and government officials.
This involvement included speaking alongside President Emmanuel Macron of the French Republic and other global statesmen at the Ocean Finance Summit in Monaco earlier this year.
The COP30 summit will align with the the royal's Earthshot environmental awards, which will finish in the Brazilian city the eve of he joins the COP summit on November 6th.
In recent days the prince described the award contenders as "contemporary champions".
King Charles has been a prominent presence at past COP meetings, giving the opening address in Dubai for the 28th Conference of Parties, including the observation: "The Earth does not belong to us, we belong to the Earth".
"I have spent a substantial portion of my life trying to alert people to the critical dangers facing us over planetary heating, climate change and biodiversity loss," the King told attendees.
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