Anna Paquin, Kristen Bell in 'Scream 4'

LOS ANGELES  - Hot news out of the horror world Wednesday: "True Blood" star Anna Paquin and Kristen Bell will make cameos in "Scream 4," now shooting in Michigan.

The Wes Craven project has a top secret script, but those in the know say the cameos are in similar nature to that of Drew Barrymore's in the original "Scream." The 1996 movie opened with an electrifying sequence of Barrymore forced to play a phone game with the killer. Jada Pinkett Smith and Omar Epps made cameos in "Scream 2."

USA Today broke the news. The Hollywood Reporter learned about the cameos a little while back but complied with a request to hold the reveal as a service to movie fans.

The script, according to insiders, is 140 pages long. The general rule of thumb is that one page equals one minute of screen time; 120 pages is already long by horror movie standards, so expect some serious cutting (no pun intended) in the editing room.

Also, the movie was originally scheduled to have a 42-day shoot, with the last day occurring on Labor Day holiday weekend (September 4-6). Now, the actors have having their stays extended to the new wrap date, September 24.