It's been a year since Chicken Little (voice of ZACH BRAFF) caused a panic in the otherwise peaceful town of Oakey Oaks by claiming that the sky was falling. With everyone having believed it was just an acorn falling from a tree, the diminutive alarmist is still the laughing stock there, much to the dismay of his widowed father, Buck Cluck (voice of GARRY MARSHALL), the one-time high school baseball legend.
Despite his status, Chicken Little still has friends in the form of Abby Mallard (voice of JOAN CUSACK) a.k.a. Ugly Duckling, Runt of the Litter (voice of STEVE ZAHN), an overweight and overreactive pig, and Fish out of Water (voice of DAN MOLINA) whose water-filled tank on his head allows him to get around, but reduces his speech to just a bunch of gurgles.
Wanting to prove he's something and impress his dad, Chicken Little joins the baseball team and manages to win the big game, making him a hero and putting his past behind him. Yet, when a strange, alien panel falls from the sky, Chicken Little is torn about what to do, since telling others proved so disastrous the last time around. When he and his friends realize that the panel is from a cloaked spaceship containing menacing, pod-like mechanical monsters, however, they set out to figure out what's going on and warn the townspeople of Oakey Oaks before it's too late.