* DawsonCasting: Creator/DanaDelany as Josephine Marcus. Delany was 36 when she played the role of a 20-year-old actress working the towns of the Wild West. Also, Creator/ThomasHadenChurch as Billy Clanton; he was 33 years old, playing a man who died at age 19.
** Then-72-year old Harry Carey Jr. plays Marshal Fred White, who only lived to be 31 years old.
* DeletedScene: Many scenes/subplots cut from the film still did not make the expanded DVD version: one sequence was the Cowboys' bonfire rally/mourning scene, which takes place the night they buried the OK Corral dead.
* DuelingMovies: Duelled with ''WyattEarp'' (1994) with Creator/KevinCostner. Where Costner's film was an epic (over 3 hours!) focused on Wyatt's life, ''Tombstone'' was an ensemble film centering mostly on the events in Tombstone and [[RoaringRampageOfRevenge the immediate aftermath]]. ''Tombstone'' was also the clear victor at the box office, more than doubling its modest $25 million budget with a domestic take of $56m (the equivalent of just over $80 million today). ''Wyatt Earp'', on the other hand, had more than double the budget ($65m) of ''Tombstone'' but wound up with half the gross, with a meager $26m domestic total, one of a string of flops in the mid-90s for Kevin Costner.
* DyeingForYourArt: Creator/ValKilmer got the emaciated and sickly look of Doc Holliday by eating almost nothing but onions and tomatoes for weeks before filming started.
* RealLifeRelative: Wyatt Earp's fifth cousin, Wyatt Earp, plays Billy Claiborne.
* ThrowItIn: Creator/BillyBobThornton’s lines were ad-libbed, as he was only told to “be a bully”.
** It was Creator/ValKilmer’s idea to whistle on the way to the O.K. Corral.
* TroubledProduction: From the start, Creator/KevinCostner was placing pressure on studios not to finance the picture (''Tombstone'' and ''Film/WyattEarp'' were two halves of the same project that more or less split off due to CreativeDifferences between Costner and writer Kevin Jarre), with Buena Vista (Disney) stepping up at the last minute. Disney refused to have anything to do with the original choice for Holliday, Willem Dafoe, due to the controversy still surrounding ''Film/TheLastTemptationOfChrist''. Jarre was originally set to direct, but was fired due to his refusal to cut the screenplay (both Creator/KurtRussell and Val Kilmer have stated the original shooting script was about 30 pages too long). Disney hired George P. Cosmatos to finish the film; Creator/KurtRussell (who had significant pull behind the scenes with both cast and crew) has in recent years made the claim that he directed the picture with Cosmatos as a front (he was the same guy who did ''Film/RamboFirstBloodPartII'', so he was at the very least agreeable to actor input), although Creator/MichaelBiehn has denied Russell's claims, and at least some of Jarre's directorial work is still in the film. As a cherry on top of all of this, the actor playing Old Man Clanton, Creator/RobertMitchum, was injured in a horse-riding accident, which led to the part being cut entirely (although Mitchum was able to do the beginning and ending narrations) and much of his dialogue given to Curly Bill.
* WagTheDirector: In an interview with True West magazine in October 2006, Creator/KurtRussell admits that after original director Kevin Jarre was fired, he directed a majority of the picture. According to Russell, credited director George P. Cosmatos served merely to make things run smoothly. Creator/MichaelBiehn denies this, however. In 2017 Kilmer stated that at the very least Russell poured in a massive amount of behind-the-scenes effort to keep the film on track after Jarre was fired, even going so far as to reduce his on-screen presence in order to focus on behind-the-scenes issues.
* WhatCouldHaveBeen: Creator/RichardGere was originally cast as Wyatt Earp with Creator/WillemDafoe as Doc Holiday. Buena Vista refused to distribute the film if he was cast, due to Dafoe's role in ''Film/TheLastTemptationOfChrist''.
** Longtime veteran western actor Creator/GlennFord had originally signed on as Marshall White; however, poor health forced him to withdraw.
** Creator/MickeyRourke turned down the role of Johnny Ringo.
** Music/JerryGoldsmith was originally attached to score this film but unfortunately had to bow out due to scheduling conflicts.
** In an interview in the late 1990s, Creator/JohnCarpenter claimed he almost directed this film.
** Kevin Jarre's original script was significantly longer than the final film. It was intended to be an epic, detailing the lives of all the combatant parties in the story.