When Mumble (Elijah Wood) stumbled on to our screens six years ago, a generation of children grew to love Antarctica's magnificent emperor penguins.
Mr Happy Feet is back again, but now he's a grown-up.
Mumble has a son called Erik (Ava Acres). However, he is no ordinary boy. Erik is reluctant to dance, which makes him different from his fellow penguins - and very different to his father.
When Erik runs away, he encounters The Mighty Sven (Hank Azaria), a penguin who can fly.
Back home, Mumble has his own problems when his penguin colony faces a catastrophic threat. Presumably caused by global warming, a huge iceberg shatters and traps the colony.
