The Girl Next Dooris a 2004 American teen film starring Elisha Cuthbert , Emile Hirsch , and Timothy Olyphant , directed by Luke Greenfield , about an honor student who falls in love for the first time with the girl next door , but finds the situation becoming complicated after he learns that she is a former porn star.

Ambitious Westport High School senior Matthew Kidman dreams of a career in politics. He has been accepted to prestigious Georgetown University , but will only be able to afford it if he can win a large scholarship. With graduation approaching, he struggles to find anything truly memorable about his high school experience. However, his luck changes when he meets his beautiful next door neighbor Danielle. The outlandish Danielle and the steady Matthew each turn out to be the perfect complement for the other, and they are immediately smitten with one another. However, the relationship is challenged when Matthew discovers through his porn-enthusiast friend, Eli, that Danielle recently was an adult film actress under the stage name "Athena".

Following Eli's advice on how to deal with this incredible revelation, Matthew takes Danielle to a sleazy motel. Danielle guesses that Matthew has discovered her past and punishes him by performing a striptease and offering herself to him. When Matthew becomes distressed and asks why she is degrading herself, Danielle calls him out on his base intentions and abruptly ends the relationship. Matthew goes to Danielle's house the following day and attempts to reconcile with her, but learns that she is returning to the porn industry, and is leaving for Las Vegas with her ex-colleague (and ex-boyfriend), a porn producer named Kelly.

Matthew, riddled with guilt, follows Danielle to Las Vegas to find her at an adult film convention where Kelly menacingly warns Matthew not to interfere with his business. When Matthew convinces Danielle not to rejoin the industry, Kelly abducts Matthew from school and physically assaults him, saying that Danielle's failure to arrive on set has cost him $30,000. Kelly offers to let Matthew erase the debt by breaking into rival producer Hugo Posh's home to steal an award statuette, but after Matthew has entered the house Kelly quietly calls in a robbery report and leaves the premises. Caught by Posh, Matthew narrowly avoids the police and rushes to his scholarship award dinner. Accidentally high on ecstasy that Kelly had told him was aspirin, he improvises a deeply sentimental speech but loses out on the scholarship - to a student who strongly resembles the passionless, pre-Danielle version of Matthew.

Kelly gets his money back by stealing the $25,000 Matthew raised to bring Samnang, a brilliant Cambodian student, to study in the United States. Not wanting to explain his connections to the adult film industry, Matthew had previously introduced Kelly to the bank staff as his student advisor. Although Matthew has not committed a crime, he still fears that he will face expulsion or criminal charges for his unwitting role in the fraud, and he reluctantly turns to Danielle for help. Danielle calls in a few friends from her days as a porn star, and they agree to make a video for Hugo Posh on prom night, on school grounds, and using Matthew's classmates as actors. After the successful shoot, and after Eli has been dropped off with the tape's master copy, Danielle and Matthew have sex for the first time in their limousine. Despite Danielle's past, it is the first time she has truly made love, and the moment is tender and significant for each of them.