In the original Death at a Funeral (2007) screenplay, the character that Peter Dinklage ended up playing was of average height and not written as an Achondroplasic dwarf; the character was changed for him after he auditioned and was cast. He then became the only actor to reprise his role in this remake.
This movie is a remake of the 2007 movie of the same name, Death at a Funeral (2007). Although Hollywood has a history of making American versions of foreign films, the original versions are usually in a language other than English - not the case here, since the original film was a British production and filmed in English. This is a very unusual case of a remake being made very quickly of an English-language movie that had a theatrical release in the US (albeit not a very successful one).
In one scene, Ryan (Martin Lawrence) clarifies that Aaron (Chris Rock) is only a few months older, both were born in the same year. In real life, both Chris Rock and Martin Lawrence are born in the same year 1965, but Chris Rock is older.
One of the oft-mentioned photographs involving Edward and Frank features them dressed as Deena and Effie attending the premiere for Dreamgirls (2006). Loretta Devine, who portrays Edward's widow Cynthia in this film, originated the role of Lorrell in the original 1981 Broadway production of "Dreamgirls" and made a cameo in its 2006 film adaptation. Danny Glover, who plays Uncle Russell, co-starred in the film version as Marty Madison.
Peter Dinklage and James Marsden were both in X-Men Days of Future Past (2014).Dinklage was the main villain Bolivar Trask while Marsden as Cyclops (though it was just a cameo appearance in the latter part of the film).
Three members of the cast have appeared in movies based on Marvel comics: James Marsden in X-Men trilogy, Zoe Saldana as Gamora in Guardians of Galaxy and Peter Dinklage as Bolivar Trask in X-Men: Days of Future Past.