Jim Sturgess, Geoffrey Rush, Rachael Taylor and David Wenhem have been added to the voice cast of Zack Snyder's animated movie Guardians Of Ga'Hoole.

The quartet join Hugh Jackman, Hugo Weaving and Ryan Kwanten, who have already agreed to lend their vocal talents to the children's tale.

Based on Kathryn Lasky's novel, the movie revolves around a barn owl and his friends as they join forces with the eponymous guardians to protect their kingdom.

Snyder, whose next film is superhero drama Watchmen, will direct from a script by John Collee (Happy Feet) and John Orloff (A Mighty Heart).