United Kingdom, April 25 -- Finneas would be "really sad" if he had no children before dying.

The 27-year-old singer-songwriter - who is the brother of pop superstar Billie Eilish - feels he has had a "lucky life" so far thanks to accolades including 10 Grammy Awards, but he knows he'd regret it if he doesn't go on to have a family of his own.

He told the i newspaper: "If I only had six months to live, the only thing I'd be really sad about would be not getting to have kids.

"I'd say, 'Oh, that sucks.'

"Everything else, I'd be like, 'Man, I had such a lucky life.'"

While Finneas and Billie have a close relationship, both personally and professionally, he admitted it is difficult for them to go out together because the 'What Was I Mad...