'Your Holiness, thank you for granting me this private audience with you,' DiCaprio said in Italian as he arrived in the Apostolic Palace and kissed the pope's ring.
He gave the pope a cheque from his charitable foundation and presented him with a book of works by the 15th-century Dutch painter Hieronymus Bosch.
'As a child I didn't quite understand what it all meant, but through my child's eyes it represented a planet, the utopia we had been given, the overpopulation, excesses, and the third panel we see a blackened sky that represents so much to me of what's going in in the environment,' DiCaprio told the pope.
