Disney Pixar has released the first two photos from Toy Story: Partysaurus Rex, debuting in front of Finding Nemo 3D on September 14. This short focuses on Wallace Shawn's Rex, who gets picked for a bit of bath time fun with Bonnie. Take a look at the photos, and then read on for more details from the actor, as well as director Mark Walsh, about this new Toy Story Toon.

Wallace Shawn has voiced the cranky Rex since the first Toy Story way back in 1995. Here's what the actor had to say about his character finally getting a chance to have some fun for a change.

"He's sick of being the angel of goodness and sensibleness and caution and fear. He wants to stand on the side of pleasure and happiness and joy. I live this drama every day of my life!"

Director Mark Walsh talked about the dichotomy of being a "bath toy," and those that get left behind at the bottom of the tub.

"If you're a bath toy you get really intense playtime. It's like a party. Then when the water goes down you can't move. You're helpless. And that's pathetic, these guys in the bottom of the tub all the time."

Since Rex is the only bath toy with arms, he uses them to turn the water on and keeps the party going for the other forgotten toys. Here's what the director said about Rex reinventing himself.

"What I was going for was, you move to a new town and make new friends, and suddenly you think you have this chance where you can reinvent yourself. I love that Rex, in his sweetness, thinks he can reinvent who he is in the image of a party animal."