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Climate change activist Greta Thunberg graciously let Critters 3star Leonardo DiCaprio post an Instagram pic with her on Friday.

DiCaprio, who also dabbles in climate activism, praised Thunberg in the post as a "leader of our time" and called upon world leaders to take her message seriously. He also called out the initiative Fridays for Future, which tracks and promotes climate strikes around the world.

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"I hope that Greta’s message is a wake-up call to world leaders everywhere that the time for inaction is over. It is because of Greta, and young activists everywhere that I am optimistic about what the future holds," he wrote. "It was an honor to spend time with Greta."

Well, of course!

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