Yo-ho-ho! After successfully putting their own slant on Charles Dickens's A Christmas Carol, the colourful, crazy Muppets send up Robert Louis Stevenson's pirate classic as only they can.

The Great Gonzo and Rizzo the rat take centre-stage in a tale of buried treasure and angry warthogs, while Jennifer Saunders, Billy Connolly and Tim Curry head the human cast.

But they can't really compete with 101 different kinds of cloth-headed co-stars, with every Muppet character from the Swedish chef to Kermit getting a look in.

Being a Muppet adventure, there are several songs, with Cabin Fever a showstopper that would make Busby Berkeley Kermit-green with envy.

Surprisingly, many of the jokes are aimed at an adult audience, but the film still has all-round family appeal.

Especially funny is a running gag featuring a group of water-surfing margarita-swilling rats who pay Rizzo to join the ship on a world cruise.

The breezy direction is in the capable hands of Brian Henson, son of Muppets creator Jim Henson.