"He would have liked to have been here tonight," Daniel said, "he liked a good party. We did some very emotional scenes together. It is very hard."
All the stars were at the amazing spectacle in London's Leicester Square, including the lady behind the books JK Rowling - and she had some great news for fans impatient for book five.
Newsround's Lizo quizzed her on the next book in the series and as well as saying she enjoyed the film, revealed that the book would be ready very, very soon.