According to MTV.COM, the screenplay to Indiana Jones 4 is still holding up the process of getting that movie started.

"We just keep working on it," stated George Lucas. "You know, we just write and write and write and write and write. But we are getting closer, and hopefully this year we will have a start date and we will have a script that we all love and hopefully it will come out next year."

Lucas also went on to say that Jeff Nathanson (Catch Me If You Can) has joined the team of scribes trying to crack the script.

Harrison Ford will once again play the man in the brown fedora and about who the franchise is named. Steven Spielberg is also set to direct this fourth installment.

Indiana Jones and the Kingdom of the Crystal Skull was released May 22nd, 2008 and stars Harrison Ford, Cate Blanchett, Karen Allen, Shia LaBeouf, Ray Winstone, John Hurt, Jim Broadbent, Igor Jijikine. The film is directed by Steven Spielberg.