When Anderson started courting Hackman for the role, he sent the actor some preliminary artwork to help convey the tone of the film, which Hackman never returned, possibly because he tossed it straight into the trash. A portion of his s**t-boiling rage was stirred by the fact that he resents being offered roles that were written with him in mind, which he told Anderson in a face-to-face meeting before Anderson had even started writing The Royal Tenenbaums. The other reason was money -- The Royal Tenenbaums didn't have much of a budget, and Hackman's character is in nearly every scene, which means he'd essentially have to work every single day of filming for a much smaller salary than he was used to.

Touchstone Pictures

Hackman eventually let his agent talk him into accepting the role, but not before making a solemn vow to be the biggest son of a b***h he could during filming. Making sure everyone working on The Royal Tenenbaums knew he'd literally rather be beaten to death with coat hangers than be in their f*****g movie was just below "turn in a good performance" on his list of priorities. According to the cast and crew, Hackman became increasingly intolerable as filming went on, venomously snapping at people for the slightest transgression and generally making Anderson's life miserable. He treated Anderson like his no-good, hipster nephew, telling him to "pull up his trousers" and straight up calling him a c**t in front of the crew.

Touchstone Pictures

Things got so bad on set that the rest of the cast, including veteran actress Anjelica Huston, were scared to be anywhere near Hackman. In an effort to try to ease the tension, Anderson eventually asked Bill Murray to come in on his (Murray's) days off, because Murray, in addition to being Anderson's friend, was apparently the one person who just wasn't intimidated by Hackman. Murray gladly showed his solidarity by supervising the filming of several scenes, including one where he stood on a ridge overlooking the shoot in a cowboy hat, because nobody messes with Bill Murray in a goddamned cowboy hat. The experience was so negative that when asked what it was like to work with Hackman, Murray begins his response by calling Hackman a c********r.

Between takes of this ultra-serious mob drama, the cast were goofing off like middle schoolers on substitute teacher day pretty much all the time. One of their favorite running gags was to drop their pants and moon each other. It all started with James Caan and Robert Duvall, who, for some indescribably insane reason, decided the only way to overcome their nervousness about working with the legendary Marlon Brando was to flap their naked ass cheeks at him in between takes, which probably had the screen veteran wondering just what the hell kind of drugs these young Hollywood kids were taking and if they had any leftovers he could buy.

Paramount Pictures

However, if you're under the impression that Brando was above asinine hijinks, then you have seriously overestimated him. While cameras were being put in place and 500 extras were being assembled for the film's famous wedding scene, Brando took the opportunity to turn around, pull down his pants, and flash his legendary trouser hams to the entire cast and crew. It is up for debate whether his ass or his Don Corleone face looked more like a sad bulldog.

Paramount Pictures

As a reward for this noble (read: unbeatable) act of public exposure, Caan and Duvall presented Brando with a belt that read "Mighty Moon King," which is a great name for a David Bowie album and/or one of Frank Zappa's children. It is unclear whether Brando accepted the belt himself, or if he sent a fake Native American woman to reject it on his behalf.

According to Sutherland, O'Connell once bailed on a day of filming because he wanted to visit a local fair. At a glance, this sounds like a minor-yet-adorable inconvenience, considering that O'Connell escaped from his moviemaking obligations by tying his babysitter to a bannister and running into town, which is literally a plot point from The Goonies.

Warner Bros.

However, it turns out the fair that O'Connell was so stoked on attending wasn't the typical Ferris-wheel-and-cotton-candy type of fair -- it was more of a "hippies spreading free love and handing out suspicious foodstuffs" kind of fair. Whereas he was expecting rides with a degree of safety that, at best, could be called "questionable," what he got instead was a bag of cookies because fat children love dessert. As you may have guessed, those cookies were baked with a little bit more than chocolate chips, and O'Connell was found sitting by himself in a park, sobbing and confused because he had just eaten an entire bag of pot cookies. In other words, a 13-year-old kid with no prior drug history had consumed a dose that would've thrown a grown man into full-on freakout mode.

Columbia Pictures

Rather than retitling the film Stand by Me and Tell Me the World Isn't About to End, Man, the producers opted instead to shut down production for two days while O'Connell recovered, presumably swearing off cookies forever.

Some of the worst examples of Monroe Madness happened on the set of her most famous film, Some Like It Hot. Already a household name at this point, Monroe routinely decided that a star of her caliber didn't need to worry about things like showing up to work on time. On the rare occasion that she did appear on set, Monroe never bothered to have her lines memorized beforehand. We're not talking about long Shakespearean monologues, either -- in one scene, it took Monroe 60 takes to deliver the line, "It's me, sugar!" The director, Billy Wilder, became so exasperated by her absent-mindedness that he resorted to taping her parts of the script onto the backs of furniture on set so she could read them like cue cards.

United Artists

The difficulties didn't just end with tedious back-to-back takes, either. Oftentimes when Monroe would flub a line, she'd burst into tears and run back to her acting coach, or lock herself in her trailer for hours. Today, somebody might have recognized this as evidence of a serious emotional problem, but the crew of Some Like It Hot just took it as another sign of her movie-star aloofness.

Her costars weren't any more sympathetic. Despite playing her romantic partner onscreen, Tony Curtis later admitted that she was "mad as a hatter" and said that if it weren't for her famous bust, she would have wound up in an asylum. If that wasn't enough of a burn, Curtis also said that their on-screen kiss was a horrible experience and that all things considered, he would "rather be kissing Hitler." Curtis really didn't like Monroe, is what we're saying.

United Artists

Monroe earned so much heat on set that Wilder refused to invite her to his home for the film's wrap party. When asked if he would ever work with her again, Wilder said his doctors advised against it, which as you may have noticed, is advice that physicians typically dole out when you tell them you're planning on smoking two cartons of cigarettes and running a marathon.

The actresses were more invested in f*****g with each other in hilariously childish ways than putting together a quality motion picture. Before filming even began, Davis replaced all the Pepsi dispensers on set with Coke dispensers, a petty slight against Crawford, who was married to the president of Pepsi. When Crawford complained, Davis had all the Coke bottles lined up outside Crawford's door; predictably, Crawford wound up tripping over the bottles and injuring herself, presumably while Davis watched from behind a bush, laughing her ass off.

Davis wasn't content to restrict the physical endangerment of her costar to an off-screen rivalry. During the filming of a fight scene between the two actresses, Davis delivered a very real kick to Crawford's face, resulting in an angry shoe print that required stitches.

Warner Bros. Pictures

Crawford finally got back at her during a later scene, in which Davis had to drag Crawford's lifeless body. Unbeknownst to Davis, Crawford had lined her dress with lead weights, causing the then-54-year-old Davis to throw her back out. Personally, we would've just dropped her. After the film was released and Davis was nominated for an Academy Award, Crawford lobbied hard to make sure Davis didn't win despite the fact that it would've been great publicity for the movie (Anne Bancroft wound up with the Oscar, which Crawford cheerfully accepted in her place). She hated Davis so much that she literally sabotaged her own film out of spite.

Warner Bros. Pictures

Davis would later say of Crawford, "That b***h hated working with me on Jane and vice versa." Crawford responded by saying the best fun she ever had was when she got to push Davis down the stairs during filming. That's like Brad Pitt saying his favorite part of Se7en was getting to shoot Kevin Spacey in the face.

First of all, to prepare for auditions, Lazenby purchased one of Connery's old suits and even got his hair cut by Connery's personal barber, just to help maintain the illusion. That makes an odd sort of sense, considering he was trying out for an iconic role created by Connery, but once he successfully landed the role, Lazenby didn't throttle back. He decided to adopt all facets of the James Bond lifestyle, short of filling Fort Knox with nerve gas and kicking a fat German gangster out of an airplane.

According to Lazenby, the prestige of being the new official James Bond went to his head faster than a vodka martini. He rode around in a personal helicopter and could walk right in to any nightclub anywhere in the world, free of charge. Oftentimes, the clubs would actually pay him to come inside, because who doesn't want to party with 007?

United Artists

"It wasn't difficult to get laid," he admitted in a 2012 interview, just in case anyone thought a former model who recently graduated into the world-famous role of James Bond had any trouble convincing women to have sex with him. "You'd get four or five girls a day." Lazenby even went out and bought a Luger, which the gun shop owner gladly handed over upon recognizing that his customer was James freaking Bond (guns are normally much more difficult to buy in Europe). As if to illustrate this point, on the set of On Her Majesty's Secret Service, Lazenby would frequently make crew members nervous by drunkenly tossing liquor bottles into the air and shooting at them, presumably trying to hone his aim should he suddenly find himself having to do battle with a bunch of Soviet spies.

United Artists

As Lazenby later put it, "I was totally out of control ... I wanted to be James Bond, but you couldn't live the way James Bond lives." Eventually, he achieved a moment of clarity in which he realized that the Bond lifestyle was sustainable only in fiction -- in the real world, womanizing, gun-toting boozehounds usually end up disappearing in a pool of STDs, liver disease, and accidental death reports. As desperate as he had been to carry Connery's baton, Lazenby actually turned down a multimillion-dollar contract to continue the role of James Bond, a move that not only ended his brief run as 007, but also his entire movie career. So we got 12 years of Roger Moore instead.

For more Hollywood hell holes, check out 6 Beloved TV Shows (That Traumatized Cast Members For Life). And then check out The 23 Most Insane Ways Famous Actors Got Into Character.