On Sunday night, well after many of us should have been asleep, Leonardo DiCaprio finally lay claim to a Best Actor Oscar for his work in the gorgeous and haunting "The Revenant." DiCaprio had been nominated five times previously for films like "The Wolf of Wall Street" and "The Aviator," and his win was met with a standing ovation from his peers.

"I have to thank everyone from the very onset of my career," said the 41-year-old. "To my parents, none of this would be possible without you. And to my friends, I love you dearly, you know who you are."

As he did after his Golden Globe win earlier this year, the actor took a moment to urge action on climate change.

"Making ‘The Revenant’ was about man's relationship to the natural world," he said. "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. 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."

As we've highlighted before, DiCaprio's speech isn't just talk. In the last eight months alone, the actor's foundation has donated $30 million to dozens of environmental organizations working to save species and critical habitat.

"Currently, less than 3 percent of all philanthropic giving goes to defending our planet," DiCaprio said in a statement last month. "Again 3 percent of all philanthropic giving goes towards the protection of our ONLY home, planet Earth."

So what's next for Hollywood's now-official King of the World? Here's a brief rundown of projects DiCaprio is eyeing in the short-term.

A new environmental documentary

As part of his new partnership with Netflix to bring more caused-focused films to audiences, DiCaprio (who formerly made waves with his 2007 climate change documentary "The 11th Hour") is in production on a new environmental documentary. While no title or release date have been dropped, he did reveal that the project has filmed all over the world — from Argentina to the Arctic, and China to India. “It was an eye-opening experience,” DiCaprio told Parade. “We’re absolutely digging our own ecological grave.”

'The Devil in the White City'

Speaking of graves, DiCaprio's reported next project is heavy on the macabre. The actor is once again teaming up with director Martin Scorsese to star in "The Devil in the White City." The film, based on the best-selling book by Erik Larson, tells the true story of the rise and capture of America's first serial killer. Named H.H. Holmes, the 19th century madman built a "murder hotel" to lure in victims attending Chicago's World's Fair in 1893. The horrific structure was created with trap doors, slides, and other nightmare contraptions that may have played a part in taking the lives of as many as 200 victims.

'The Crowded Room'

If he can pull it off, DiCaprio's other-rumored next project sounds like another potential Oscar score. According to THR, the star will take on the true story of Billy Milligan, the first man to successfully use multiple personality disorder as a defense in a court of law. Just how many personalities are we talking about? A remarkable 24 — from a lesbian rapist to an uptight Englishman. Called "The Crowded Room," it's a story that Leo has reportedly been interested in starring in since 1997.

Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.

What's next for Oscar-winner Leonardo DiCaprio?
From a new environmental documentary to playing a 19th century serial killer, here's what Hollywood's top male star will be doing.