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

Rance Howard

Elderly Timekeeper

T.J. Thyne

Stu Lou Who

Jim Meskimen

Officer Wholihan

David Costabile

Biker Who

Deep Roy

Post Office Clerk

Michaela Gallo

Who Schoolgirl

Landry Allbright

8-Year-Old Martha May Whovier

Suzanne Krull

Shopper

Steve Kehela

Shopper

Verne Troyer

Band Member

Q'orianka Kilcher

Little Choir Member

Caroline Williams

Tiny Who Woman

Rick Baker

Puppeteer

Tim Blaney

Puppeteer

Charles Croughwell

Balloon Who

Frank Welker

Max the Dog (voice)

Anthony Hopkins

Narrator (voice)