Actor Daniel Radcliffe arrives for the premiere of the film "The Woman In Black" in New York January 30, 2012.[Photo/Agencies]

Daniel Radcliffe wants to have children while he is young.

The 'Harry Potter' actor - who is dating 22-year-old movie production assistant Rosanne Coker - explained while it would be "ridiculous" to suggest the couple were going to become parents anytime soon, he considers kids to be the "most fulfilling" part of life.

He said: "We both want the same things. But we also know it would be ridiculous anytime soon. I always wanted to have kids young, but I also thought, 'That's going to be hard work.' I've seen a lot of friends become immeasurably happier, but very tired.

"Kids are the single greatest, most fulfilling thing I've seen happen to people. But we've got a lot of fun times ahead before that happens. I have had a lot of youthful enthusiasm left, I promise."

The 22-year-old star admitted although he doesn't believe in "fate", he doesn't think he will ever find another partner he is "more compatible" with than Rosanne.

Daniel added to Britain's Glamour magazine: "We went on two dates. Dinner, cinema. And I spent the next year discovering this amazing, kind, funny tolerant person.

"I'm not a believer that there's one person out there for everybody, I don't believe in fate but I do think that when you find somebody who you love, and who loves you, you've got to cling on to them and make it work.

"I really don't see myself looking around much more. I don't think I'll ever find someone more compatible than Rosie."