Aussie movie star Geoffrey Rush has signed up add his voice to the new Green Lantern movie
The King's Speech star will portray TomarRe, the alien who teaches the new Lantern, Ryan Reynolds, how to use his new powers.
Rush won't actually appear in the film - the character will be computer generated.
Reynolds will play Hal Jordan, the first human to join the Lanterns - an intergalactic peace-keeping force.