Benedict Cumberbatch

Grinch (voice)

Rashida Jones

Donna Lou Who (voice)

Kenan Thompson

Bricklebaum (voice)

Cameron Seely

Cindy Lou Who (voice)

Angela Lansbury

Mayor McGerkle (voice)

Pharrell Williams

Narrator (voice)

Ramone Hamilton

Axl (voice)

Sam Lavagnino

Ozzy (voice)

Scarlett Estevez

Izzy (voice)

Michael Beattie

Store Clerk (voice)

Scott Mosier

Additional Voices (voice)

Lori Alan

Additional Voices (voice)

Carter Hastings

Additional Voices (voice)

Carlos Alazraqui

Additional Voices (voice)

John Kassir

Additional Voices (voice)

Cathy Cavadini

Additional Voices (voice)

Danny Mann

Additional Voices (voice)

Meilee Condron

Additional Voices (Voice)

Tristan O'Hare

Groopert (voice)

Doug Burch

Additional Voices (voice)

Tucker Chandler

Additional Voices (voice)

Townsend Coleman

Additional Voices (voice)

Abby Craden

Additional Voices (voice)

Brian T. Delaney

Additional Voices (voice)

John DeMita

Additional Voices (voice)

Bill Farmer

Additional Voices (voice)

Aaron Fors

Additional Voices (voice)

Willow Geer

Additional Voices (voice)

Jess Harnell

Additional Voices (voice)

Evan Kishiyama

Additional Voices (voice)

Barbara Harris

Additional Voices (voice)

Jeremy Maxwell

Additional Voices (voice)

Laraine Newman

Additional Voices (voice)

Dashiell Priestley

Additional Voices (voice)

Alex Puccinelli

Additional Voices (voice)

Emma Elizabeth Shannon

Additional Voices (voice)

Joel Swetow

Additional Voices (voice)

Mindy Sterling

Additional Voices (voice)

Tara Strong

Additional Voices (voice)

Regina Taufen

Additional Voices (voice)

Jim Ward

Additional Voices (voice)

Kevin Hart

Snowball (voice) (uncredited)