Leonardo DiCaprio has officially met the Pope. The actor had a private meeting with Pope Francis at the Vatican on Thursday morning. "Leo explained that he wanted to discuss a subject they both have very much at heart: protecting the environment and climate change," a source tells PEOPLE. DiCaprio, 41, arrived at the Vatican at 11:15 a.m. local time and was accompanied by his father, George DiCaprio, and Milutin Gatsby, global fundraising chair for the actor's namesake charity, the Leonardo DiCaprio Foundation. During the 15-minute meeting, the actor presented the pontiff with a check from his environmental philanthropy for him...