How the Fanboy Stole Christmas (2000)

The Grinch - Fanboy (Fanboy & Chum Chum)

Cindy Lou Who - Jenny Wakeman (My Life As A Teenage Robot)

Max - Dino (The Flintstones)

Martha May Whovier - Yo (Fanboy & Chum Chum)

Lou Lou Who - SpongeBob SquarePants

Betty Lou Who - Sandy Cheeks (SpongeBob SquarePants)

Mayor Augustus May Who - Mr. Waternoose (Monsters,Inc.)

Whobris, the Mayor's Aid - Adult Tantor (Tarzan)

Drew Lou Who - Kyle (Fanboy & Chum Chum)

Stu Lou Who - Brad (My Life As A Teenage Robot)

Officer Wholihan, the chief of police - Makunga (Madagascar:Escape 2 Africa)

8-year-old Grinch - Chum Chum (Fanboy & Chum Chum)

8-year-old Augustus May Who - Sid Phillips (Toy Story)

8-year-old Martha May Whovier - Kimi Finster (Rugrats)

8-year-old Whobris - Young Tantor (Tarzan)

Narrator as himself

Miss Rue Who - Lola Bunny (Looney Tunes)

Clarnella - Miss Kitty (An American Tail:Fievel Goes West)