The United Nations have bestowed an honor upon Leonardo DiCaprio, naming 'The Wolf of Wall Street' actor a Messenger of Peace by the organization.

The Hollywood Reporter reports that DiCaprio has been asked by the organization to speak at the U.N. Climate Summit on Sept. 23 to address the topic of climate change.

"It's an honor to accept the role of U.N. Messenger of Peace on Climate Change and to support the Secretary General in his efforts to address one of the most important issues we face as a global community," DiCaprio said in a statement. "I feel a moral obligation to speak out at this key moment in human history — it is a moment for action. How we respond to the climate crisis in the coming years will likely determine the fate of humanity and our planet."

According to their website, U.N. Messenger of Peace and Goodwill Ambassadors are "distinguished individuals, carefully selected from the fields of art, literature, science, entertainment, sports or other fields of public life, who have agreed to help focus worldwide attention on the work of the United Nations. Backed by the highest honour bestowed by the Secretary-General on a global citizen, these prominent personalities volunteer their time, talent and passion to raise awareness of United Nations efforts to improve the lives of billions of people everywhere."

Other celebrities who have been given the Messenger of Peace honor include George Clooney, Stevie Wonder, Edward Norton and Charlize Theron.

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