Originally posted by arto_j
Ian McKellen's official website has denied that rumor that he has signed on to The Prisoner of Azkaban. He is not signed, and Christopher Lee also said that he hasn't even been offered it. The Sun is (like about all British tabloids) definitely not a trustworthy source for information on films, especially casting news.
I read that Christopher Lee would say YES if he were asked to play Dumbledore. But as of yet, he said that he has not been asked.