|Daniel Day-Lewis (AP)|
Speaking with The Mirror, the 'Lincoln' star said, "They didn't even know what I was doing until a couple of years ago."
"In fact, my 14-year-old boy was asked what I did and he said, 'I think he's in construction'. That's how much they know!"
The 55-year-old actor, who is nominated for an Oscar for his role in 'Lincoln,' added that he believes he's an "old fashioned" parent.
"My parents believed in certain things, which I do too," he said. "I want my children to also. But there's no guarantee they will."