GETTY Leonardo DiCaprio won the Academy Award for Best Actor

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The 41-year-old won the Academy Award for Best Actor thanks to his role in box-office hit The Revenant. After thanking the likes of Tom Hardy and his parents, the Titanic actor then went on to deliver a lecture on climate change.

He told the star-studded audience: "Making The Revenant was about man's relationship to the natural world. "A world that we collectively felt in 2015 as the hottest year in recorded history. Our production needed to move to the southern tip of this planet just to be able to find snow."

GETTY Leonardo preached about climate change during his speech

GETTY Viewers called Leonardo a 'hypocrite'

Oscars 2016: red carpet Sun, February 28, 2016 All of the red carpet pictures from the Oscars 2016 being held at the Dolby Theatre in Hollywood, Los Angeles Play slideshow Getty 1 of 71 Brie Larson, Kate Winslet and Cate Blanchett looked stunning on the red carpet at the 88th Academy Awards

Not ending his speech there, Leo continued: "Climate change is real, it is happening right now. It is the most urgent threat facing our entire species, and we need to work collectively together and stop procrastinating. "We need to support leaders around the world who do not speak for the big polluters, but who speak for all of humanity, for the indigenous people of the world, for the billions and billions of underprivileged people out there who would be most affected by this. "For our children’s children, and for those people out there whose voices have been drowned out by the politics of greed. I thank you all for this amazing award tonight. "Let us not take this planet for granted. I do not take tonight for granted. Thank you so very much," he finished up by saying.

WENN Leo is often pictured on his yacht

GETTY Actor was congratulated by Kate Winslet