It seems actor Leonardo DiCaprio, who will soon return with his new movie "The Revenant," had to struggle a lot while shooting under harsh conditions for the movie in snowy terrain from Alberta to Montana and Tierra del Fuego, Chile.

To beat the extreme cold, DiCaprio was provided a hot air blower which kept him and the other crew members warm throughout the shoot. He named it octopus.

"We actually had a machine on set, I nicknamed it the octopus because it was like a giant hot air blower with eight tentacles, and we'd all rush up to it and thaw our hands," DiCaprio said at a post-screening Q&A moderated by Martin Scorsese at New York's Lincoln Ristorante on Tuesday, reported Page Six.

He recalled a night when the crew got caught in horrific weather conditions which lasted for an hour in temperatures that dropped to minus 40 degrees and his eyes and hands froze, and then the cameras began to freeze.

"We were doing an emotional scene, and then this windstorm came, and it was just brutal," the actor said, according to NZHerald. "We were out there for an hour, and I said, 'Alejandro, what the hell are we doing?'"

"It's a mental state. Weather doesn't exist," said director Alejandro G. Inarritu.

Despite extreme weather conditions, Inarritu encouraged the cast of the film to forget about the cold climate.

"The Revenant" is based on the 19th century explorer Hugh Glass who is left to die alone by his crew after being attacked by a bear. Fuelled by vengeance, Glass struggles to find his way home and takes revenge from the people who left him to die.

The period drama stars DiCaprio as frontiersman Hugh Glass, alongside Tom Hardy, Will Poulter and Domhnall Gleeson.

The film is slated to get released on Christmas this year.