Cast[]
- The Grinch - Angel Dust
- Cindy Lou Who - Mabel Pines
- Max - Bernie
- Martha May Whovier - Vagie
- Lou Lou Who - Katz
- Betty Lou Who - Carol
- Mayor Augustus May Who - Grim Gloom
- Whobris, The Mayor's Aid - Vlad
- Drew Lou Who - Marco Diaz
- Stu Lou Who - Ansi Molina
- Drew and Stu's Girlfriends - Star Butterfly and Agent Xero
- Officer Wholian - Razmo
- 8-Year-Old Grinch - Young Angel Dust
- 8-Year-Old Agustus May Who - Young Grim Gloom
- 8-Year-Old Martha May Whovier - Young Vadgie
- Miss Rue Who - Marcella
- Clarnella - Rita Loud
- Clarnella's Sister - Tooth Fairy
- Who's - Ponies, People of Townsville and Imaginary Friends
- Mouse - King the Owl House