United Kingdom, Aug. 28 -- Robert De Niro thinks working parents always "feel a little guilty" about missing time with their children.

The 83-year-old actor - who has Drena, 54, Raphael, 49, 30-year-old twins Julian and Airyn, Elliot, 28, and Helen, 14, from previous relationships and Gia, three, with partner Tiffany Chen - doesn't believe there is a "secret" to being a good father but it important to try to manage expectations around commitments in every area of life.

Asked the key to fatherhood, he told People magazine: "I don't know if there is a secret. "It's just managing it all. And there's no way around not feeling a little guilty about not being there at times you should or you think you should."

The Whisper Man actor noted tha...