Description:Learn 10 fun facts about actor Robert De Niro. As a teenager, Robert joined a street gang while living in Manhattan. He has 6 children, the most recent born via a surrogate mother in December 2011, at the age of 68. De Niro has the same birthday as former co-star and good friend Sean Penn. At one time, he held the world record for 'Most Weight Gained for a Movie' for the role in 'Raging Bull'.