• Actor Leonardo DiCaprio attends the National Geographic Channel 'Before the Flood' screening at United Nations Headquarters on October 20, 2016 in New York City.

Actor Leonardo DiCaprio attends the National Geographic Channel 'Before the Flood' screening at United Nations Headquarters on October 20, 2016 in New York City. (Photo : Getty Images/Michael Loccisano)

Academy Award winner Leonardo DiCaprio, 41, nearly died during an expedition to the Galapagos. However, three-time Academy Award nominee Ed Norton, 47, rushed to his rescue and saved the day.

DiCaprio stars in a new documentary "Before the Flood," which chronicles the dangers of climate change. The film's director Fisher Stevens has now revealed a scary incident from 2010 when "The Revenant" actor nearly drowned during an underwater dive.

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In an interview with GQ magazine, Stevens recalled the time he travelled to the Galapagos Islands with DiCaprio and Norton for a TED conference expedition. They were with oceanographer Sylvia Earle.

The filmmaker was shooting Earle using a small underwater camera and asked DiCaprio if he would film her instead since he was her diving buddy and the actor answered in the affirmative. Everything was going just fine until something went wrong with DiCaprio's oxygen tank.

"Leo bolts away with Sylvia and Edward goes in front of me and the next thing I know after twenty minutes, I'd lost them all," Stevens told the publication. "Then I see Leo barely breathing, because Leo's tank was leaking oxygen, and Edward had to save him."

The director said that he also tried to help the actor but things got scary when he started having trouble breathing. Stevens added that even though the situation was terrifying, he and DiCaprio really bonded on the trip.

DiCaprio is not a stranger to near-death experiences. Not only has he nearly been eaten by a shark when a great white jumped into his cage during a cage dive in South Africa, he has averted certain death after his plane was forced to make an emergency landing due to blown up engine on a flight to Russia.

"My friends have named me the person they least want to do extreme adventures with, because I always seem to be very close to being part of a disaster," the actor said in another interview with Wired. "If a cat has nine lives, I think I've used a few."

Watch the trailer of DiCaprio's upcoming documentary "Before the Flood" below: