not take tonight for granted."
It is 22 years since he was first nominated for an Academy Award, having been nominated for best supporting
actor for What's Eating Gilbert Grape.
Speaking to reporters after his win, DiCaprio said: "I feel
very honoured, to share this has been an amazing experience, to sit there and talk about the film.
"I also got to talk about something I have been obsessed
with - the environment and climate change - on a platform with hundreds of millions of people watching worldwide."
As he accepted his award, Inarritu said it was a "great
opportunity to our generation to liberate ourselves from
all prejudice", saying the colour of someone's skin
should be "as irrelevant as the length of their hair".
It is the fourth Oscar for Inarritu, having won best director, best original screenplay (as co-writer) and best picture (as producer) for Birdman in 2015.
Larson had won praise for her role as abducted woman
Ma in Room, based on the book by Emma Donoghue.
The actress thanked everyone involved in the film, inclu