The official Indiana Jones site accidently put up its full cast page and quickly took it back down. But before they did a piece of secret casting that they have kept from annoucing got leaked.
Lucas regular, Ian McDiarmid will be in the movie starring as a character named Professor Levi. And it seems to be more than a quick cameo based on the sizable write up the character got on the leaked page that got taken down:
Lucas regular, Ian McDiarmid will be in the movie starring as a character named Professor Levi. And it seems to be more than a quick cameo based on the sizable write up the character got on the leaked page that got taken down: