They join the previously-announced Billy Crystal, John Goodman, Steve Buscemi, Dave Foley, Helen Mirren, Julia Sweeney, Joel Murray and Peter Sohn in the prequel that’s described as follows:
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.
Monsters University opens in theaters on June 21.