Singer Jesse McCartney voices the taciturn Jo-Jo, the littlest Who.
Horton Hears A Who - Articles
The upcoming trailer will be shown exclusively with 'Horton' starting March 22.
Carell stars in 'Horton' as the miniscule Mayor living in a speck.
The CGI family-event 'Horton' stars Carrey as the voice of Horton the elephant.
'Horton' is a larger-than-life CGI family event that presents an imaginative elephant.