. >> they spent almost half their lives playing hermione granger and ron weasley.>> in my first audition, i first met dan and emma, it does seem like such a long time ago. >> nicholas flamel is the only known maker of the sorceror's stone. >> with were kind of reading, a scene from the forbidden section of the library. i remember hearing my voice, really kind of quiet. >> the three young stars have gone through so much together, becoming famous the world over at such a young age. >> it's been 11 years of quite an intimate process, where you're kind of with each other every day all year, every year. it's quite unique kind of thing we've shared with each other, i think. >> so what do they really think of each other? >> he's always been quite hyperactive, quite loud. he's very funny. >> dan is the most energetic, hard working kind person. he works very, very hard. so he's pretty incredible. >> she's great. she's really kind of caring. >> he's a real eccentric. he's a genuine eccentric. i've never been to his house but i would love to go because it sounds like it's ful

>> the book smart know it all hermione granger and harry's sidekick ron weasley. the books and seven movies so far made stars out of the three-then ungnome actors. daniel radcliffe, emma watson -- and rupert. they have grown up before our eyes. >> it's really strange. that's the only way i can describe it. it's -- it's been -- i mean -- i was so young, it's difficult to remember much of my life before this thing happened to me. so -- it coming to an andy, it's -- it's huge. i was 9 years old. you know -- i was still losing teeth. if that puts it in perspective. i was still losing baby teeth. >> the first hit was an instant hit for warner brothers like cnn is owned by time warner, but that wasn't a surprise. by then harry was already a household name around the world to the millions of fans of the books. and it was all dreamed up by an unlikely author. j.k. rowling, who at that time was a single mother on welfare when she came up with an idea about a boy who does not know he's a wizard. >> do you remember how -- it's impossible to say how an idea came about. >> uh-

there's a pivotal scene at the end of the movie, a final fight during the battle of hogwarts, with ron weasley's, something carter says fans will look forward to. >> we had a duel and i wanted the duel to be like fencing without making contact. it was really hard work. at the end, we delve needed the chiropractor after. it's very easy to throw your shoulder out. >> carter is not one to hold back. when we asked er to tell us a secret from the set, she opened the floodgates. >> i did a wee wee, don't tell anyone. >> seems after giving birth to her daughter and returning to work, her bladder wasn't what it used to be. >> i'm barely able to stand up let alone jump around and screaming. bellatrix screams. anybody who had a baby, you know if you're jumping up and down and waving -- there's 25 takes. you have no idea what's happening down there. larry, you did ask me. >> carter's played many quirky characters over the careers but said she has an affection for bellatrix and her time on "harry potter." >> i loved it and it's been a real privilege to be part of it. to be part of it stimulates this mass ma

he plays ron weasley. last time he was here, he said hello to everybody. >> 23 years old now.st such novices in the business. and now daniel radcliffe just kicking it uu like crazy on broadway. we're going to talk with him in a few minutes and find out what he's going to do next. i can't even magine what an emotional roller coaster this has been for them. their whole childhood was there. they started tearing down the sets like hogwarts and all that stuff. >> and the ages of the people who were out there on the line. were 18, 19, 20. some of them were young kids when it started. they were there from the beginning. >> i think 450 million books did sold. it's made $6 billion, the movies? it's just -- it's a complete phenomenon. when you think of jk rowling, wrote it all sitting there with her, she was homeless. >> she's unbelievable. >> we have some guests here not who came to see rupert grint -- >> you. >> kayla, elena, we are some friends visiting. >> they came friday, we weren't here and soothey came back today. >> i like whhn people make return visits. >> she said, i met jerr

. >> reporter: rupert grint has been playing ron weasley for almost half of his life. 21-year-old emmamomo feelsike i'm watching another person. like i can't even identify with that girl. she feels almost foreign to me. it's like so much has happened. >> reporter: the three children became so famous so quickly, they lived what one of their directors called a strange, distorted life. and yet they have somehow managed to remain down to earth. they did it, rupert told me, by leaning on each other. >> just kind of being in the same kind of boat, really, from day one. and completely sharing this s quite unique way of growing up. >> reporter: their bond grew closer over time. which made the romantic scene emma and rupert had to play in the final film all the more difficult. >> she's like a relative, really. and the thought of kissing her just was a bit freaky. >> reporter: all are anxious to move on. but also sad to leave. >> i really kind of didn't expect me to really kind of feel like this, really. these kind of closing days. but it really has kind of hit me quite hard. >> it is amazing th