The CGI film adaptation of the Dr. Seuss classic Horton Hears A Who (1954), captures all the spirit of the 1970 Chuck Jones animated short. What if your entire known universe was only a tiny speck of dust on a flower carried by an elephant? Jim Carey is the voice of Horton, the helpful elephant and Steve CarellSteve Carell voices the Mayor of Who-ville. Until the film is release March 14, check out the theatrical trailer.