This Blu-ray disc requires a Blu-ray player will not play in standard DVD players.

Blu-ray disc ; High definition.

Title from disc.

Based upon the book by Dr. Seuss.

Special features: audio commentary with directors Jimmy Hayward and Steve Martino ; all new Ice age short: Surviving Sid ; sneak peak of Ice Age 3 ; picture-in-picture bonus view: watch Horton hears a Who! with a Who ; deleted footage and animation screen tests ; Bringing the characters to life featurette ; That's one big elephant: animating Horton featurette ; Meet Katie featurette ; Bringing Seuss to screen featurette ; The elephant in the room: Jim Carrey featurette ; A person is a person: a universal message featurette ; Our speck: where do we fit i? featurette ; Elephant fun: the facts featurette ; We are here! game.

Music, John Powell.

Voices: Jim Carrey, Steve Carell, Will Arnett, Isla Fisher, Amy Poehler.

One day, Horton the elephant hears a cry for help coming from a speck of dust. Even though he can't see anyone on the speck, he decides to help it. Good thing since as it turns out since the speck of dust is home to the Whos, who live in their city of Whoville. Horton agrees to help protect the Whos and their home. Unfortunately for Horton, this gives him nothing but torment from his neighbors. They refuse to believe that anything could survive on the speck. Still, Horton stands by the motto that, "After all, a person is a person, no matter how small."

MPAA rating: G.

Blu-ray ; Dolby Digital 5.1 surround, Dolby Digital surround, 1080p High Definition.

This Blu-ray disc will not play in standard DVD players.

English (Dolby 5.1), French (5.1 Dolby surround) or Spanish (5.1 Dolby surround) ; Cantonese, English, Korean, Mandarin or Spanish subtitles; closed-captioned (English SDH).