The first pictures of Toy Story: Partysauras Rex have been unveiled. The animated short film from Pixar features the often-scared Rex having his own adventure, and will play at cinemas before Finding Nemo 3D from September 14.
Rex discovers that he becomes much less of a nervous wreck when he joins in with bath time.
The film is the third in Pixar's Toy Story Toons series, which follows Woody, Buzz and friends with their new owner Bonnie.
"He's sick of being the angel of goodness and sensibleness and caution and fear," voice actor Wallace Shawn told Entertainment Weekly.
"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 added: "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."
"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."
On whether fans could see a changed Rex in a possible Toy Story 4, Shawn added: "I suppose it will be debated in history books whether toys evolve and mature, and perhaps reach a mid-life crisis. This is a debatable point."