Ubisoft revealed today that actors from the new James Cameron film Avatar will voice the same roles in the game adaptation. Sigourney Weaver, not seen recently in the Ghostbusters game, will play Dr. Grace Augustine in the Xbox 360, PS3, Wii, and PC versions of the game. Michelle Rodriguez will appear as helicopter pilot Trudy Chacon in the PC, PS3, and 360 games, which will also feature bad guy Col. Quaritch, played by Stephen Lang. Giovanni Ribisi (from My Two Dads) will appear only in the Wii version, as "the arrogant Parker Selfridge." The best news out of all of this, of course, is that none of these actors are James Cameron.