The first trailer(s) for Disney/Pixar’s Monsters University (a prequel to Monsters Inc.) are finally here!

It’s really four variants of the same trailer with Billy Crystal’s character, Mike Wazowski, muttering something different in his sleep in each variant.  Director Dan Scanlon said that it was just too hard to choose just one from voice actor Billy Crystal’s many improvisations, so they went with four.

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.”). The film opens in U.S. theaters on June 21, 2013, and will be shown in Disney Digital 3D™ in select theaters.