United Kingdom, June 5 -- Robert De Niro will always "support" his children, even if he disagrees with their choices.

The 81-year-old actor - who has Drena, 57, Raphael, 48, 29-year-old twins Julian and Airyn, Elliot, 27, and Helen Grace, 13, from previous relationships and two-year-old Gia with partner Tiffany Chen - believes the most important thing a parent can do for their kids is to always back their decisions.

He told 'Entertainment Tonight': "The main thing is to support your kids. As long as they're not hurting themselves, doing anything destructive or anything like that, you have to support them - period.

"Even if you don't go with it-you have to support them. And they have to know that you support them. Always."

The 'Goodfel...