Two stars died young, in ways which were eerily prophesied by the script. Jeremy Applegate, whose character prays he will never commit suicide, shot himself on March 23, 2000. Kim Walker, whose character asks "Did you have a brain tumor for breakfast?", died of a brain tumor on March 6, 2001.
Originally, the book that suicidal students supposedly underline "meaningful" passages from was "The Catcher in the Rye". The producers could not get permission from J.D. Salinger to use the book. It was changed to "Moby Dick" because Herman Melville's works are in the public domain.
Shannen Doherty had problems saying the profanities in the script because of her conservative upbringing. She couldn't keep a straight face. As a result, she smirks when she says, "Veronica, why are you pulling my dick?"
This is considered one of the most controversial movies ever made, certainly one of the most controversial about the high school experience. When it was released, detractors thought it was making fun of suicide. Now it's controversial because of its uncomfortable similarity to so many school shootings.
In 2014, a musical theater adaptation of Heathers opened at the off-Broadway theater New World Stages. In a completely unrelated coincidence, the movie had been released by a film production company called New World Pictures. The play is tenatively set to appear on Broadway in 2016.
The high school is named "Westerburg High". Winona Ryder's favorite band at the time was The Replacements, whose lead singer is named Paul Westerberg. Another reference to the band occurs when J.D. says "Color me impressed", which is the title of a song from The Replacements' album "Hootenanny".
A 2014 Entertainment Weekly retrospective revealed that the original read-through of the script with the producers was held with Dana Delany playing Veronica Sawyer and Brad Pitt as J.D. During subsequent casting, Shannen Doherty was first interested in playing Veronica but Winona Ryder had already been cast. Producers wanted Doherty to audition to play Heather Chandler but Doherty preferred the part of Heather Duke and was eventually cast in that role.
J.D. says that the bullets to the gun that him and Veronica shoot the jocks with are German bullets called "ich luge" and they don't really kill the people you shoot them with, "ich luge" is German for "I lie".
"Hot Probs", the radio call-in show featured in the movie, is a version of the nationally-distributed KROQ radio show "Loveline". The DJ in the movie is James 'Poorman' Trenton, the creator and original host of "Loveline".
Mid-1990's-era ska/punk band 'Edna's Goldfish' named their song "Veronica Sawyer" after the main character in Heathers. The song's theme of alienation among suburban teenagers reflects the themes of the movie. Reel Big Fish covered the song on their 2009 album "Fame, Fortune and Fornication."
Several characters sardonically use the phrase "Oh, the humanity." This phrase was first coined by the American radio reporter Herbert O. Morrison during his May 6, 1937, on-the-spot description of the explosion of the Hindenburg in New Jersey. Morrison started his broadcast with a calm report of the zeppelin starting to dock after its transatlantic flight, but he quickly became panicked and horrified as he started to relay the disaster: "It's starting to rain again; it's-the rain has slacked up a little bit. The back motors of the ship are just holding it just, just enough to keep it from-It burst into flames! It burst into flames, and it's falling, it's crashing! Watch it, watch it! Get out of the way! . . . It's fire-and it's crashing! It's crashing terrible! Oh, my, get out of the way, please! It's burning and bursting into flames, and the-and it's falling on the mooring-mast and all the folks agree that this is terrible, this is one of the worst catastrophes in the world. . . . It's-it's-it's the flames . . . oh, four- or five-hundred feet into the sky and it ... it's a terrific crash, ladies and gentlemen. It's smoke, and it's flames now ... and the frame is crashing to the ground, not quite to the mooring-mast. Oh, the humanity and all the passengers screaming around here. . . . Honest, it's just laying there, a mass of smoking wreckage. Ah! And everybody can hardly breathe and talk, and the screaming. . . . Honest: I-I can hardly breathe. I-I'm going to step inside where I cannot see it. Charlie, that's terrible. Ah, ah-I can't. I, listen, folks, I-I'm gonna have to stop for a minute because I've lost my voice. This is the worst thing I've ever witnessed."
Ironically, Kim Walker, who played the leader of the Heathers, Heather Chandler, was dating Christian Slater while they were filming Heathers. Also ironically, according to Christian Slater anyway, Slater dumped Walker so that he could date Winona Ryder. Ryder doesn't remember actually dating Christian Slater though.
In Heathers The Musical one of the biggest changes the producers made to the story was that Martha "The Dump Truck" becomes Veronica's former best friend; not Betty Finn. Also Heather, Kurt and Ram make ongoing appearances in the show after their deaths in dream sequences.
Veronica's name came from mismatching two of the heroes of the Archie comics, Betty Cooper and Veronica Lodge, with two of the heroes of Tom Sawyer, Tom Sawyer and Huck Finn. Hence, the two heroes of Heathers are Veronica Sawyer and Betty Finn.
Kurt Kelly [II] was originally asked to play the role by the same name, Kurt Kelly in the New World Pictures Production (presents) of the film Heathers (1988). Kelly was not only a full-time Network Broadcast Executive for ABC Los Angeles, he was also on air personality with Joe Walsh of The Eagles, and the late Rick Rosas The Bass Player for Jo0e Walsh as a soloist, and for Neal Young and Crazy House. ABC insisted that if Kurt Kelly was to maintain his Executive Network Management position, where he was also an On-Air Personalty, and for him to retain his worldwide consult agreements; Kurt would have to turn down the role.
While Producing worldwide television, radio, film, commercials and satellite broadcasts, Kurt Kelly [II] was also asked to appear as Kurt Kelly in the 80's film Heathers (1988) by Production Companies New World Pictures; however, ABC would not grant him the time off from his already nonstop schedule for the taping of the film. The role of Kurt Kelly later when to Lance Fenton.
The Fox Network considered turning Heathers into a sitcom for its fledgling network; but jettisoned this idea in favor of developing Beverly Hills 90210 into it's new teen themed series. The fact that these two teen themed projects were developed in tandem by casting agents at Fox eventually led to Shannen Doherty being cast in 90210.
The original screenplay had a different ending in which Veronica kills J.D. by shooting him and then straps the bomb (a much larger and more complicated piece of equipment, described as being "a cylinder as large as a television set") to herself, blowing up as J.D. does in the final ending. What is placed in the final ending as JD's boiler-room speech about "imagine I blew up the school, imagine I blew up all the schools" is contained in a suicide note found in Veronica's locker by Heather McNamara and Betty Finn. The movie ends with an eerie prom sequence set in Heaven, tying into JD's assertion that the only place everyone will truly get along is in Heaven. The prom begins with students dancing within their social cliques, then switching partners in odd pairings like metalheads dancing with Heathers and one of the murdered jocks getting his prom picture taken with a tipped cow; the punch being served is the drain cleaner used in the first murder scene, and "Dumptruck" is singing onstage as the entertainment for the evening. This was intended to be shot but the studio thought it was too dark for the target teenage crowd and opted for a lighter ending.
One alternate ending had Martha Dumptruck stabbing Veronica. Martha shouts "Fuck you, Heather!" Veronica, lying on the ground with a knife in her stomach, replies "My name's not Heather! My name's not Heather!"
Writer Daniel Waters said in an interview: "I did come up with this crazy, cockamamie "Heathers 2" where Veronica becomes a page for a senator named Heather, played by Meryl Streep. The ending is her assassinating the president and getting away with it - and it's a good thing." Winona Ryder has heavily supported the idea for a sequel, but as of 2014, nothing has come out of it.
Winona Ryder claims that she has many favorite moments from the film. The one that usually comes to mind is when she is walking up the hill after seeing JD in the cow-tipping scene. In the background, just barely visible, Heather McNamara is being date raped by one of the jocks. Ryder says the scene is so subversive and dark that once you notice it, you can't stop thinking about it.
The original ending involves Veronica killing herself with JD's bomb, quietly saying "bang" and the school being destroyed. Keeping true on JD's words about how different social types can only get along in heaven. The scene then would cut to black and it would show a prom in heaven with Martha Dunnstock singing to a crowd of different social types dancing together. This was rejected for being too dark.
When Heather Chandler falls through the glass table, a copy of the Cliff's Notes for "The Bell Jar" (by Sylvia Plath, who committed suicide) and a magazine with a cover story "The Fall of the American Teenager" are on top of the table.
When J.D. asks Veronica if she takes German, she replies that she doesn't, but instead takes French. He then tells her the bullets they're going to use for their "prank" are German ones called "Ich Lüge" bullets. "Ich lüge" directly translates to "I lie" from German to English.
Winona Ryder claims that this is her favorite movie. She also says that she gets asked about Heathers 2 more than anything else, although a sequel seems unlikely. The filmmakers have suggested that they would like to do the project. One of the plot lines includes JD being a CIA agent before his death. The CIA would then blackmail Veronica and the story would end with Veronica assassinating the President.