From Cinematical:

“Today in New York City, our Moviefone colleague Kevin Polowy attended the Disney/Pixar Animation Presentation hosted by Dick Cook and John Lasseter. Apparently, a whole handful of new, upcoming titles were announced — some of which we’ve known about and some brand new. Additionally, they screened 30 minutes of WALL-E footage and announced that Sigourney Weaver would do a voice in the film.”