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)