Pixar’s presentation at Disney’s D23 Expo in Anaheim, California Friday morning included lots of new details surrounding their 2014 movie The Good Dinosaur.

UPDATE: New concept art below. Click for full size!

Their sole film next year is also an original story. It is directed by Bob Peterson.

For starters, the short film to precede Good Dinosaur is a Monsters University-themed movie called Party Central. It is directed by Kelsey Mann. The short film includes the slug voiced by Bill Hader. The actor was on stage to introduce the clip.

The Good Dinosaur cast were also revealed today:

Poppa – John Lithgow
Mama – Frances McDormand
Forrest – Bill Hader
Cliff – Neil Patrick Harris
Ivy – Judy Greer

Hader, Greer, and Neff were all on stage to discuss the film in front of fans.

The main character of the film is an Apatosaurus named Arlo played by Lucas Neff. In footage shared at the event, the dinosaurs have become agrarian farmers. Clips showed them plowing fields and tending to their crops.

In another clip, Arlo meets a caveman (a young boy) for the first time. It is the first human that a dinosaur has ever seen.

The Good Dinosaur opens in theaters May 2014.

Thanks to Inside the Magic and The Pixar Times’ Twitter accounts for the information.