This is simply amazing news: Eric Roberts (THE EXPENDABLES, THE DARK KNIGHT) is the "big Hollywood celebrity" Tom Six has been looking to cast for THE HUMAN CENTIPEDE III. Don't resist, you know this is brilliant.
The specifics of Roberts' role have not been revealed, but the film's IMDb page lists him as playing the "Governor". We know how reliable that site is, so we'll take it with a grain of salt right now. Also added to the cast: Tommy "Tiny" Lister (THE FIFTH ELEMENT, THE DARK KNIGHT), character actor Robert LaSardo and porn star - and Charlie Sheen's ex - Bree Olson.
These thespians join Dieter Laser, Laurence R. Harvey and director Six himself in the film, which has just commenced production in Los Angeles. Rumor has it the film takes place in a prison and involves a 500-person centipede. Yum!
Hopefully more info will crawl in soon.