- The Cat in the Hat as Gru
- Vector as The Grinch
- Paul the Minion as Fox in Socks
- Jerry the Minion as Mr. Knox
- Maysie as Margo
- Cindy Lou Who as Edith
- Daisy-Head Mayzie as Agnes
- Jane Kangaroo as Ms. Hattie
- The Lorax as Dave the Minion
- The White-Tufted Floozle Bird as Gru's Mom
- Joey as Dr. Nefario
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