Two new teaser posters for Pixar's Monsters University have been released online, Digital Spy said.

One of the posters shows the tiny Mike Grabowski (Billy Crystal) standing on a pile of text books to have his photo taken with the giant but cuddly Sully (John Goodman).

Monsters University is set before the events of Monsters Inc. and traces the journey of Mike and Sully as they go through scare school.

The pair are apparently reading textbooks such as Scarenomics and The Complete Monster Encyclopedia at university.

When the duo are kicked out, they join a fraternity called Oozma Kappa, which promises revenge on MU.

Pixar also released a poster of the two monsters in their dorm room, with Sully on the top bunk and Mike looking disgruntled on the bottom.

The 3D animation is released in the US on June 21, 2013 and in the UK on July 12.