Robin Williams was considered for the role of Barry Speck.
This is actually a remake of a Hindi classic comedy movie: Bheja Fry .
When this project was in early development, Sacha Baron Cohen was set to play the lead.
The lead roles were originally intended for Steve Martin and Bill Murray.
The movie uses two The Beatles elements. One is the song "Fool on the Hill", used in the opening and closing song number. The other is a lyric "I'm a dreamer, but I'm not the only one" from John Lennon's song "Imagine".
Jeff Dunham, who plays Lewis the Ventriloquist and his "wife" Debbie, is a popular comedian known for his ventriloquism. Debbie, renamed Diane, went on to appear as part of his act in Dunham's Identity Crisis Tour in 2010.
In one of the mice dioramas, a bottle of Dom Perignon is called "Veber". Francis Veber wrote and directed The Dinner Game (1998), the film which inspired this remake.
Shipped to theaters under the code name "Emphasis".
While in Kieran's house, Barry notices a picture of Kieran standing next to Nelson Mandela, and confuses Mandela with Morgan Freeman. Freeman portrayed Nelson Mandela a year before in Invictus (2009).
The exterior shot of the house were the dinner is held is the same as "stately Wayne Manor" from the original Batman television series.