Stephen Root has boarded Fox Searchlight's Cedar Rapids and the Robert Redford-directed historical drama, The Conspirator, according to The Hollywood Reporter.

In Cedar Rapids, Root joins Ed Helms, Anne Heche and John C. Reilly, playing the proud owner of an insurance company and Helms boss' in the ensemble comedy being directed by Miguel Arteta.

With The Conspirator, Root joins James McAvoy and Robin Wright in the drama, where he'll play a principal witness for the prosecution in the trail of a Confederate sympathizer who is tried as a conspirator in the Lincoln assassination.

No production dates were announced.

Cedar Rapids was released February 11th, 2011 and stars Ed Helms, John C. Reilly, Anne Heche, Isiah Whitlock Jr., Stephen Root, Kurtwood Smith, Alia Shawkat, Rob Corddry. The film is directed by Miguel Arteta.

The Conspirator was released April 15th, 2011 and stars Robin Wright, James McAvoy, Evan Rachel Wood, Alexis Bledel, Justin Long, Tom Wilkinson, Norman Reedus, Kevin Kline. The film is directed by Robert Redford.