Horton Hears a Who is an animated film about Horton, an elephant, and his quest to save those who he believes live on a speck of dust.

Horton Hears a Who received positive reviews from critics. The film scored a 79% on Rotten Tomatoes, an overall rating of 71 on Metacritic.

The box office gross for the U.S. totaled $149,949,90 and $125,955,000 abroad for a total worldwide of $275,904,901. The production budget for the film was reported to be $85 million.

• USA Today: Horton Hears a Who Review (3.5/4)
  • "One senses that the good doctor would be pleased with this cinematic treatment of his beloved 1954 book"

• TIME: Horton Hears a Who Review
  • "...Making superior use of the voice talents of Jim Carrey, Steve Carell, Carol Burnett, Seth Rogen, Will Arnett and others, the movie proves a funny, elevating ride that should beguile the young and keep their parents or grandparents enthralled too. For once, the G rating stands for Glorious."

• ReelViews: Horton Hears a Who Review (3/4)
  • "There are messages for those who look for such things (about having faith in things that can't be seen - the religious aspect is hard to ignore - and treating people the same regardless of their differences) but the movie can be enjoyed on a less intellectual level."

• Toronto Star: Horton Hears a Who Review (4/4)
  • "Still, I'm happy to say," critic Howell wheezed, "They rise to the challenge! Dr. Seuss would be pleased! "This is animation most animate, a kid-pic so rare, "That even adults will fall off their chairs!"

• Washingtonpost.com: Horton Hears a Who Review
  • "A computer-animated feature that strikes an amiable balance between honoring the text and the dictates of contemporary animation, the film is as good as one could hope for in this era of post-literate impatience."

• A.V. Club: Horton Hears a Who (C)
  • "But just because the live-action Seusses have dialed down expectations doesn't mean that Horton shouldn't aspire to more than time-wasting mediocrity. There are precious childhoods at stake here."

• Chicago Tribune: Hears a Who Review (2.5/4)
  • "Someday, if we're all good little boys and girls, the world will hand us a Dr. Seuss film half as wonderful as one of the books."