Kevin Spacey has signed on to play Jason Bateman's horrible boss in Seth Gordon's dark comedy, Horrible Bosses.  The film is about three miserable employees (Bateman, Charlie Day, and Jason Sudekis) who decide that they'll kill each other's bosses.  Colin Farrell and Jennifer Aniston have already been cast as two of the three bosses, while Foxx plays a scam artist. THR says Spacey will play "Bateman's boss, a master manipulator with an attractive wife. The role is described as meaty and integral to the movie and New Line was in talks with several names, including Tom Cruise, Philip Seymour Hoffman and Jeff Bridges, before nabbing Spacey."

The film's got a strong cast and it's not a stretch to see Spacey play a horrible boss, because he kind of mastered it already with his brilliant performance in 1994's Swimming with Sharks.  Horrible Bosses is currently slated to hit theaters on July 29, 2011.