You beat me to the punch, again.
Yes, she is going to be in Scream 4 (Scre4m, the official title). She confirmed it on the Tonight Show with Jay Leno on June 16th. She will being playing Kate Kessler, mother to Jill Kessler played by Emma Roberts. Jill is the cousin to Sidney who is Neve Campbell's character. Neve, Courteney Cox and David Arquette have all signed on for this and the next two movies. We don't know yet what part Lauren's character will play other than Jill's mom so not sure what will happen to her in the movie so don't know if she will be in the other two or not. I am kind of anxious to see her in this movie, which is schedule to come to theaters on April 15, 2011. I have actually already seen posters for it in the theater that I go to.
I went to see all of the first three movies with a friend who really wanted to see them. The first two were okay, but I fell asleep several times during the third. I vowed never to go see any others that were made, but now I guess I will have to go and see the 4th, which is the first of three in the 2nd trilogy. Not only is it something that Lauren will be in and it will actually come to theaters all over so we can finally see her on the big screen again, but it starts filming on June 28th in Ann Arbor, MI which is pretty close to me. I hope to find out just where and when the filming will be and what days Lauren will be there so I can try to get there to watch a little of the filming. As much as I would love to meet her, I would probably make a fool of myself so I would just be happy if I could just see her filming something for it or just see her walking around.
EDIT: Well, I guess I don't have to worry about going to see another Scream movie since Lauren has backed out because of script changes.