Cate Blanchett has signed on to star in the fourth installment of the "Indiana Jones" adventures says The Hollywood Reporter.

David Koepp's screenplay is being kept under wraps so it is unclear what character Blanchett will play, though sources indicate it's a major role.

Harrison Ford already has boarded the project, which will be produced by Lucasfilm and directed by Steven Spielberg.

Shooting will begin in June in Los Angeles and at undisclosed locations around the world. The film will get a release on May 22nd 2008.