Last December, Russell Brand signed on to Rentaghost based on the British children's TV series that ran from 1976 to 1984.  The show centered around a company that rents out ghosts to perform various tasks, and Brand was set to play "Fred Mumford, a recently deceased loser who feels he can find work for ghosts whose lives were as failed as his."  However, Deadline now reports that Brand has dropped out of the film and has been replaced by Ben Stiller who will partner with his Night at the Museum writers Thomas Lennon and Robert Ben Garant.The plot will now have Stiller playing "an American turnaround consultant who is sent to the UK to reinvigorate a failing company."  Fox sees it as another strong family franchise and I see it as another film where Stiller will be the straight man to a cast of zany ghosts who help him to learn a valuable lesson.  Hit the jump for a recap of other films Stiller has in the pipeline.Stiller will next be seen this November opposite Eddie Murphy in Brett Ratner's Tower Heist.  He's currently shooting on the Akiva Schaffer's Neighborhood Watch which re-teams Stiller with Vince Vaughn and also stars Jonah Hill, Billy Crudup, Doug Jones, Richard Ayoade, Rosemarie DeWitt, and Nicholas Braun.  Stiller is also the latest actor who wants to get the remake of The Secret Life of Walter Mitty into theaters and he's also attached to direct the film.  Finally, there's always Zoolander 2 hovering in the background.  On last week's Saturday Night Live, he made a special appearance as the beloved character, but that doesn't necessarily mean the film is any closer to happening since he still has to work out the budget with Paramount.