I found a list of the 20 houseguest. It seems to be pretty acurate form the commercials and the rumors we have heard. I got this from another site I cannot mention
Here it is!
William (Bunky) Miller
George Boswell
Howie Gordon
Kaysar Ridha
James Rhine
Marcellas Reynolds
William (Will) Kirby
Jase Wirey
Michael Ellis
Mike Malin
Alison (Ali) Irwin
Dana Varela
Danielle Reyes
Diane Henry
Erika Landin
Ivette Corredero
Janelle Pierzina
Lisa Donahue
Jennifer Dedmon (nikomis)
Monica Bailey
There are also 5 alternates that may be thown in at the last minute. Those include Jun, Nathan, Scott,Holly and one I could not find info on.