Aloysius O'Hare is the main antagonist of the 2012 adaptation of The Lorax. He is the ruthless (former) mayor of Thneedville, Morty and McGurk's former boss and Ted's arch-nemesis. He hates trees because he thinks they are a threat to his air business. After he sings about letting trees die, he gets kicked out of Thneedville by his bodyguards, Morty and McGurk on a jet engine.
He was voiced by Rob Riggle, who also voiced The Male Skeleton from Hotel Transylvania and Bela from its 2015 sequel Hotel Transylvania 2.