Cate Blanchett Joins "Indy 4" Cast
The film's screenplay is being kept under wraps, so there aren't any details about the character Blanchett will be playing, but according to the Hollywood Reporter, it'll be a starring role.
Blanchett in "Babel"
First, however, she'll reprise her queenly role in the sequel to "Elizabeth," "The Golden Age," star with Brad Pitt in David Fincher's "The Curious Case of Benjamin Button" and provide voicework for Wes Anderson's "The Fantastic Mr. Fox." "Indiana Jones IV" -- which, as of this very moment, does not star Shia LaBeouf -- is scheduled for a May 23, 2008 release.
Source: The Hollywood Reporter