Elijah Wood's traded in hairy hobbit feet as Frodo Baggins for funky flippers as Mumble, the vocally-challenged penguin. Robin Williams and Brittany Murphy also give their vocal chords a workout as plucky penguins with soul in new musical animation Happy Feet. Here, the lively bunch enthuse about the movie and the joy of song.

WATCH: The Happy Feet cast on busting moves and bum notes.

Happy Feet is released in UK cinemas on Friday 8th December 2006.