Tim Robbins, Martin Landau, Marianne Jean-Baptiste, Harry Treadaway have joined 20th Century Fox's fantasy "City of Ember" reports the trades.

The Gil Kenan-directed, Walden Media/Playtone project has Robbins playing an inventor holding a secret to the magical, glitteringly lit city whose power generator is failing.

Landau will play the boss of Robbins' character's teen son (Treadaway), who works at the city's mysterious Pipeworks as the son seeks to save the city with a fellow teen.

Jean-Baptiste will play a tough greenhouse worker. Bill Murray, Toby Jones and Saoirse Ronan are already set to co-star.

An October 2008 theatrical release is already planned through Fox. Shooting is presently under way in Belfast, Ireland.