From Fangoria.com:

Peter Facinelli (Carlise Cullen), Cameron Bright (Alec), and Anna Kendrick (Jessica Stanley) from THE TWILIGHT SAGA: NEW MOON have all been added to the growing lineup of Wizard World Chicago (now being touted as the Chicago Comic-con) which will take place August 6-9, 2009 at the Donald E. Stephens Convention Center.

The organizers of the pop-culture heavy event contacted FANGORIA this afternoon to share a host of new additions to the guest list, and to dangle the carrot of something very special to be announced on Monday.

Other Media Guests include:

· Michelle Rodriguez - Resident Evil
· Rhona Mitra - Underworld: Rise of the Lycans
· Ray Park - Darth Maul Star Wars: Episode 1, X-Men
· Edward James Olmos - Actor - Battlestar Galactica, Blade Runner
· Kristanna Loken - Actress - Terminator 3, Painkiller Jane
· Emma Caulfield - Played Anya on Buffy: The Vampire Slayer
· Doug Jones - Pan's Labyrinth, Hellboy I & II
· Ernie Hudson - The Crow, Ghostbusters
· Jake Busey - The Frighteners, Starship Troopers
· Luke Goss - Hellboy II & Blade 2
· Cerina Vincent - Cabin Fever
· Rowdy Roddy Piper - They Live

And this is just a sample. Check out the full list here, and here's the additional message direct from Wizard Entertainment:

**WE ARE MAKING A MAJOR GUEST ANNOUNCEMENT FOR CHICAGO ON MONDAY, JULY 13th on wizardworld.com. THIS GUEST IS HUGE IN BOTH SIZE AND STATURE. YOU WILL NOT BE DISAPPOINTED!**

SOURCE