James Earl Jones, who plays the stuttering shop clerk, actually did have a stutter like his character.
Henry describes his tombstone reading "1951 dash 2014" and then says "it's not the dates that matter... it's the dash." This comes from a famous poem by Linda Ellis entitled "The Dash" written in 1996.
The movie marks the return of Phil Alden Robinson in directing a movie, after twelve years of absence.
The movie is a remake of the Isreali movie Mar Baum (1997), which was directed/written by/starred Assi Dayan, the son of Israeli general and Minister of Defense Moshe Dayan.
Sharon Gill (Mila Kunis) says her parents were from Wisconsin. That is where Kunis' character Jackie Burkhardt from That '70s Show (1998) is from.