The Whos in How the Grinch Stole Christmas! may or may not be the minuscule Whos of Horton Hears a Who; In the Broadway musical Seussical, the Grinch's Whos and Horton's are one and the same, the Grinch being microscopic and living on the dust speck as well. However, in the live-action Grinch movie, Whoville is located in a snowflake.