Dateline NBC's special Harry Potter: the Final Chapter featured interviews with J.K. Rowling, Rupert Grint, Emma Watson and Daniel. 

Below the quotes from Daniel.

You know, you get a sense of it at the premieres.  Because you see all the fans there.  And you think, "These guys really love it."  But equally, you think this stretches way beyond these guys.  Because it's not just a superficial thing.  Harry's a character that's worked his way into the collective consciousness of millions of people of all ages around the world.

I had read the first two, and after I got the part, I obviously thought well, I must read these, obviously. And-- and I did, and just loved them.  And, you know, I'm sort of a case in point, really, of somebody who didn't really read at all, and-- and read the Harry Potter books and then have now, from then on, been devouring as much literature as I possibly can-- which is, I think, the effect they've had on everybody.

It is a phenomenon.  I think it's partly to do with the character of Harry … It's just the most amazing kind of storytelling in that it just drags you in from the first page, you know.  It's one of the things where you just say, "All right.  Well, I'll-- I'll-- I'll read another chapter and then I'll stop."  And you-- you get to the last page of that chapter and think, "I'll go at-- okay, I'll just read the next one."  So, it's totally compulsive...

On J.K. Rowling:

Jo's always been totally lovely to me and to all of us. She's really supportive.  And-- and if you ask for advice, she'll give it.  But she would never, you know, force it on you, because she has a-- a lo-- a-- a great understanding that the films are one thing and that the books are another.

source: nbcnews.com

"Am I talking too fast?” It’s a kindness in Daniel Radcliffe to ask, and the answer is no"

"Mr. Radcliffe has long been going out of his way to assert his identity as distinct from Harry Potter’s. Yet this speech, delivered at this moment in his career, with the particular sparkle in his eyes, feels like the actor’s personal pledge never to stop striving to perfect his craft."

 Details magazine interview. Photos by Steven Klein.

HBO First Look Harry Potter and the Order of the Phoenix: Furfilling a prophecy aired on 3rd July 2007.

"With his 18th birthday around the corner and stage roles like Equus under his belt, Daniel has become a young British acting force to be reckoned with. "It's been great for the studio's sculptors to recreate someone who we've all watched growing up on the big screen."

"We had a lot of research from photos and film footage. Most times,celebrities will sit, but in this case, it did not happen"