United Kingdom, April 20 -- Daniel Radcliffe's son has no idea his dad was Harry Potter.

The 36-year-old actor has a young son, who turns three in April, with his partner Erin Darke and Daniel has revealed he's tried and failed to explain his job to the youngster.

During a conversation with Happy Sad Confused podcaster Josh Horowitz in New York, Daniel explained: "Right now I'm just his dad and he has no idea what I do. Well he's starting to...

"First of all you know your job is a little big b****** if you can't explain it to a kid. He understands what policeman and doctors and firemen do, but actors, you like: 'Well we help tell stories, like the stories in your books but we act them out.' That's sort of what we've landed on as an exp...