Disney has launched 4 teaser trailers for Pixar’s upcoming prequel to Monsters, Inc. The official synopsis, via /Film:

Mike Wazowski and James P. Sullivan are an inseparable pair, but that wasn’t always the case. From the moment these two mismatched monsters met they couldn’t stand each other. “Monsters University” unlocks the door to how Mike and Sulley overcame their differences and became the best of friends.

Screaming with laughter and fun, “Monsters University” is directed by Dan Scanlon (“Cars,” “Mater and the Ghostlight,” “Tracy”) and produced by Kori Rae (“Up,” “The Incredibles,” “Monsters, Inc.”).

Besides the one on their YouTube channel (above), they’ve released additional trailers at iTunes, Yahoo Movies and HuffPost.

The film hits theaters June 21, 2013.