The long-in-development remake of The Secret Life of Walter Mitty continues to rack up an impress supporting cast.  In the past several weeks, we've reported that Patton Oswalt and Kristen Wiig have joined Ben Stiller in the comedy, which centers on a magazine proofreader who, incapable of standing up for himself in the real world, retreats to a fantasy where he becomes his poised, confident opposite.  Today, Deadline reports that the talented Adam Scott has joined the picture, but there are currently no details on the role he'll play.Whenever Scott is in a movie, I know that I'll at least be able to point to his performance as one good thing about the flick.  The fact that we get 22 episode of him on Parks and Recreation would be more than enough, but he's also continuing to nab roles in movies.  Later this year, he'll be seen in the general releases of the festival films Friends with Kids (also co-starring Wiig) and Bachelorette, and he also co-stars in See Girl Run, My Mother's Curse, A.C.O.D., and his cult-hit TV series Party Down may be headed to the big screen.