James Cameron Talks 'Avatar' Sequels: Are All The Same Actors Returning?

Director James Cameron chats with AccessHollywood.com's Laura Saltman at the "Titanic" Blu-ray release junket about the upcoming "Avatar" sequels. Have all the actors from the first film signed up for the next two films? Plus, why does he say he's no longer in the movie business, but only the "Avatar" business?