Leonardo DiCaprio United Nation’s new Messenger of Peace Hollywood actor Leonardo DiCaprio awarded with the title of Messenger of Peace for the United Nations. The actor will run programs for environmental issues. He will be addressing about climatic change at a summit on Tuesday 23 September in New York. DiCaprio said, “I feel a moral obligation to speak out at this key moment in human history – it is a moment for action”. DiCaprio founded the Leonardo DiCaprio Foundation in 1998.