Based on the novel written by Robert Kimmel Smith. "The War With Grandpa” stars Robert DeNiro, Uma Thurman, Rob Riggle, Oakes Fegley, and Christopher Walken. Directed by Tom Hill and the screenplay was written by Tom J. Astle and Matt Ember. ...

Stand a chance to win yourself a pair of Complimentary Passes to the family comedy film The War with Grandpa! Simply answer the following question: Who plays the titular grandpa in the movie?