Hollywood star Leonardo DiCaprio has brought star power to the UN summit on climate change on Tuesday, urging leaders to stop treating global warming as "fiction".
"As an actor, I pretend for a living. I play fictitious characters often solving fictitious problems," the actor told the summit of 120 leaders.
"I believe mankind has looked at climate change in that same way - as if it were fiction."
Sporting a ponytail and a suit and tie, DiCaprio took to the podium at the invitation of UN Secretary General Ban Ki-moon to address a one-day summit billed as the largest gathering ever of world leaders on climate change.
The star of The Wolf of Wall Street and Titanic argued that climate change was a reality, pointing to "undeniable" extreme weather events as evidence of the impact of global warming.