Prince Charles was introduced to Hollywood star and environment advocate Leonardo DiCaprio at the COP26, said Clarence House on Wednesday.
The actor and the future King met when they were visiting designer Stella McCartney's installation.
According to the statement issued by the Clarence House, McCartney showcased a sustainable fashion installation at Kelvingrove Art Gallery.
On Tuesday leaders committed to lower their emissions of methane -- a potent greenhouse gas -- by at least 30 percent this decade.
Experts said the pledge could have a significant impact on short-term heating.
But a two-day world leaders´ summit ended with barbed comments from the two largest emitters, the United States and China.
US President Joe Biden criticised counterpart Xi Jinping for skipping the summit, after China declined to sign the methane pledge.