United Kingdom, April 3 -- Daniel Radcliffe has found "profound happiness" since becoming a father.

The 36-year-old actor - who shot to fame when he was just 11 years old playign the titular boy wizard in the Harry Potter movie series - doesn't think his younger self would recognise the person he is today because he used to be "deeply unhappy" but he now relishes the time he spends with his and partner Erin Darke's three-year-old son.

Speaking on a panel discussion with Project Healthy Minds after a performance of his Broadway play Every Brilliant Thing, he said: "There have been times in my life when I have been deeply unhappy, particularly when I was much younger.

"I spent today with my 3-year-old son walking along the street, with h...