At last night’s MTV Awards, actor Shia LaBeouf revealed that the title of the upcoming fourth installment in the Indiana Jones film series will be Indiana Jones and the Kingdom of the Crystal Skull.

E! News reports some addiitonal information and speculation on the film: 

The young actor [LeBeouf] is part of a heavy-hitting cast that includes Harrison Ford, Cate Blanchett, Jim Broadbent, Ray Winstone, John Hurt and Raiders of the Lost Ark love interest Karen Allen.

Although the well guarded plot of the fourth film is being kept under proverbial (and possibly actual) lock and key, Allen’s addition to the lineup has sparked speculation that LaBeouf will play her and Ford’s son, who presumably has been long-lost to the intrepid archaeologist.

Other possibilities include the British-born Hurt taking over where a now-retired Sean Connery left off as Indy’s father (or playing Albert Einstein, depending on whom you ask), Broadbent playing a bumbling yet useful sidekick à la Denholm Elliot’s Professor Marcus Brody, and Spielberg’s missus, Kate Capshaw, returning as Temple of Doom gal Willie Scott.

But all secrets will be revealed in due time. The Spielberg-directed Indiana Jones and the Kingdom of the Crystal Skull, a Lucasfilm production, has been slated for a May 22, 2008, release. Cameras started rolling in June.