As that old lady in Titanic would say, "It's been 84 years..."

It's actually only been 22 years since Leonardo DiCaprio was first nominated for an Oscar, but after two decades, he is officially and will forever be known as Academy Award Winner Leonardo DiCaprio. While his acceptance speech was charming enough, the best moment of the night was his reaction to watching his statuette engraved backstage.

WATCH: Leonardo DiCaprio and Kate Winslet Arrive Together at the Oscars

In the video, tweeted out by Variety, the 41-year-old actor watches as his name is added to his Best Actor Oscar. "Do you do this every year?" DiCaprio asks the woman, before saying with a laugh, "I wouldn't know."

WATCH: Leonardo DiCaprio Is Not Amused By 'Revenant' Bear Joke at the Oscars

DiCaprio took a more serious approach after taking the stage to a standing ovation during the 2016 Academy Awards. "Making The Revenant was about man's relationship to the natural world," the environmental activist told the crowd, using the opportunity to discuss climate change.

"Climate change is real, it is the most urgent threat facing our species," he explained. "Let us not take this planet for granted. I do not take tonight for granted."

Back to the adorableness: Kate Winslet teared up as her Titanic costar finally won an Oscar! Check out her sweet reaction in the video below.