'Deathly Hallows: Part I' is the first in the two-part adaptation of the final Harry Potter book. The second part arrives July 2011.
The young actors talked about their feelings on the penultimate film of the series and on saying goodbye to the Potter franchise. Radcliffe also touched on how Harry has changed as a character throughout the series as he -- as both an actor and a character -- has grown up.
"The whole series for me is about loss of innocence and about Harry going from this kind of wide-eyed child ... into this slightly grizzled young man by the end of it," Radcliffe told Moviefone's Mike Hess. "Although as I was saying to people the other day, it is essential that he does not turn into a man necessarily in the film, because what makes all that fight stuff at the end so powerful and so kind of horrible to watch is the fact that you're seeing a kid get beaten up by a very strong, very angry man."
'Deathly Hallows' marks the end of Harry's lifelong battle with the evil Lord Voldemort.
Check back here on Tuesday, Oct. 5, for the full set visit report and for interviews with Radcliffe, Grint, Williams and Yates.
'Harry Potter and the Deathly Hallows: Part I' premieres Nov. 19.