Mike Wazowski (Billy Crystal) and James P. Sullivan (John Goodman) is back once again on a tale that defines who they are on the hit  animated movie in 2001 (Monsters Inc).  After more than a decade, the gang is back and also back in time as they tell the story of Mike and Sully's early years as teenagers.  Watch the teaser trailer after the jump.

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.

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, to be distributed by Walt Disney Pictures.