Casting for Guillermo del Toro's Pacific Rim rolls on.
Variety has learned It's Always Sunny in Philadelphia's Charlie Day is "in talks" to co-star in the film. When his deal is completed, he'll joined Charlie Hunnam (Sons of Anarchy) and possibly Idris Elba (rumored for a role).
Day will be seen this summer in Horrible Bosses.
Pacific Rim, about giant monsters that invade earth, begins shooting this fall.