Leonardo DiCaprio, who is the front-runner at this year's Oscars in the best actor category, says working in "The Revenant" was "one of the most rewarding" experiences of his life.

The survivalist drama about the 19th century fur trapper Hugh Glass is leading in the nominations with 12 nods including the best director for Alejandro G Inarritu.

"I am so grateful to the Academy for their recognition of this film. Making 'The Revenant' was one of the most rewarding and collaborative experiences of my life," DiCaprio, 41, said in a statement.

The actor thanked Inarritu for making the film possible, which was shot in sub-zero Canadian winter. "None of this would have been possible without Alejandro's talent, vision and determination. Our dedicated crew also deserves to share in this moment. Together, they have created a truly unique cinematic experience. Congratulations to all of my fellow nominees this season," DiCaprio said.

Inarritu, who won the best director Oscar last year for "The Birdman", said it meant a lot to be appreciated for the movie.