<Li> Taylor Swift as Audrey, Ted's love interest . She is named after Audrey Geisel, Dr. Seuss' wife . </Li> <Li> Betty White as Grammy Norma, Ted's wise - cracking grandmother . </Li> <Li> Rob Riggle as Aloysius O'Hare, the mayor of Thneedville and head of the "O'Hare Air" company that supplies fresh air to Thneedville residents . </Li> <Li> Jenny Slate as Mrs. Wiggins, Ted's neurotic mother . </Li>

Who does the voice of mr o'hare in the lorax