Steven Spielberg and George Lucas announced Friday that Shia LaBeouf will star in the upcoming fourth installment of Indiana Jones.  This comes – as many similar announcements these days tend to – after months of Internet rumors and buzz surrounding the 20-year-old actor and the undoubtedly epic film, set to release on May 22nd, 2008.  Cate Blanchett has also been attached to the sequel, though it is unknown what characters either actor will play – plot details are still a mystery.  LaBeouf, already a veteran of television and film, has recently said that he is ready to drop his childlike image and focus on more mature roles.  With the recent release of Disturbia, a modern-day, Rear Window-esque thriller, the upcoming Transformers, and a high-profile action-adventure flick like Indiana Jones 4, LaBeouf shouldn’t have any trouble steering clear of youthful typecasting.  And as with most of his work, he will surely be an invaluable addition to the cast.  Keep checking back for all Indy updates right here on FilmCrunch.