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Duplex is a 2003 Comedy Film staring Creator/BenStiller and Creator/DrewBarrymore, and Directed by Creator/{{Danny DeVito}}.

It features a young couple who move in to a Duplex in Brooklyn, where an old [[CoolOldLady tenant]] is giving them hell. The tenant sends both of the couple on a myriad of errands, keeps them up all night (every night), gets them fired from their jobs, and lowers the value of the property with each passing day.

Since they can't get rid of the sweet old lady because of [[FriendsRentControl Rent Control]], they try to coerce her out of the apartment, eventually turning to less friendly methods... and getting clumsier and clumsier the more they escalate.
!!This film provides examples of:
* BadCopIncompetentCop: You start with Officer Dan who you think is just a [[PoliceBrutality unnecessarily violent]] JerkAss, but later you find it out it's [[spoiler:[[DirtyCop intentional]] to scare Alex and Nancy into leaving]].
%% * BitchInSheepsClothing: Mrs. Connely.
%% * ButtMonkey: Alex. Well, he IS played by Creator/BenStiller.
* CoolOldLady: Mrs. Connelly is an Irish seaman's widow with a parrot and a spear gun.
%% * CringeComedy: Happens often in the first half of the movie, and a bit later as well.
%% * HarmlessElectrocution: Barrymore's character, Nancy.
* IShouldWriteABookAboutThis: The main character is trying and failing to write a book throughout the movie, mostly due to his upstairs tenant. The end of the movie shows his published novel, also titled ''Duplex'', presumably about the events he experienced during the movie.
* MarketBasedTitle: The UK title is "Our House".
%% * MostWritersAreWriters: Alex is a writer.
* {{Narrator}}: Creator/DannyDeVito, who also directed the movie, is narrating it.
%% * {{Oireland}}: Mrs Connelly complete with bad Irish accent and yes, there are stereotypes which'll make Irish people vomit.
%% * ProfessionalKiller: Chick the hitman, who has a legitimate job as a pornographer.
* TheReveal: [[spoiler:Mrs. Connelly is discovered to be both alive and in fact she is the mother of Kenneth, the Duplex real estate agent, and in fact it's a RealEstateScam to make them sell the house cheaper then they bought it]].
%% * SpiritualSuccessor: Often said to be so to Danny [=DeVito's=] own ''Film/ThrowMommaFromTheTrain''.