Jim Carrey
Grinch
Taylor Momsen
Cindy Lou Who
Jeffrey Tambor
Mayor Augustus Maywho
Christine Baranski
Martha May Whovier
Bill Irwin
Lou Lou Who
Molly Shannon
Betty Lou Who
Clint Howard
Whobris
Josh Ryan Evans
8-Year-Old Grinch
Mindy Sterling
Clarnella
Bryce Dallas Howard
Surprised Who
Lacey Kohl
Christina Whoterberry
Rachel Winfree
Rose
Rance Howard
Elderly Timekeeper
Jeremy Howard
Drew Lou Who
T.J. Thyne
Stu Lou Who
Nadja Pionilla
Junie
Jim Meskimen
Officer Wholihan
Michael Dahlen
Customer
David Costabile
Biker Who
Mary Stein
Miss Rue Who
James Ritz
Crazy Mose
Deep Roy
Post Office Clerk
Jessica Sara
Sophie
Mason Lucero
Who Boy
Ben Bookbinder
8-Year-Old Augustus Maywho
Michaela Gallo
Who Schoolgirl
Landry Allbright
8-Year-Old Martha May Whovier
Reid Kirchenbauer
8-Year-Old Whobris
Rebecca Chace
Shopper
Suzanne Krull
Shopper
Steve Kehela
Shopper
Lillias White
Shopper
Rain Pryor
Shopper
John Alexander
Shopper
Kevin Isola
Tree Trimmer
Gavin Grazer
Yodeler
Walter Franks
Clerk
Verne Troyer
Band Member
Clayton Martinez
Cook
Q'orianka Kilcher
Little Choir Member
Caroline Williams
Tiny Who Woman
John Short
Tiny Who Man
Grainger Esch
Near Miss Who
Eva Burkley
Pudding Chef
Rick Baker
Puppeteer
Bill Sturgeon
Puppeteer
Mark Setrakian
Puppeteer
Jurgen Heimann
Puppeteer
Tim Blaney
Puppeteer
Charles Croughwell
Balloon Who
Frank Welker
Max the Dog (voice)
Anthony Hopkins
Narrator (voice)