Prepare to have your mind blown and heart broken at these wild behind-the-scenes feuds at the core of your favorite TV shows and movies.

Vin Diesel and Dwayne Johnson - The Fate of the Furious

There’s one word at the center of the Fast & Furious franchise. No, it’s not “car.” Or “fight.” Or “big-explosions-that-go-kapow-kablooey,” because that’s a bunch of words and you’re cheating.

It’s “family.” It’s what unites the characters. But not, apparently, what unites two of the franchise’s biggest stars. “Biggest” being literal.

When Dwayne “The Rock” Johnson joined the Vin Diesel-starring franchise in Fast Five, it seemed like destiny. But they butted heads immediately, with Johnson posting cryptic messages on Instagram talking about Diesel. In The Fate of the Furious, they refused to shoot scenes together, resulting in some creative editing choices.

Bruce Willis and Cybil Shepard - Moonlighting

They were playful. Contemporary yet timeless. And an outright pleasure to watch. Bruce Willis and Cybil Shepard were the perfect couple on comedic detective series Moonlighting. But while they were cracking cases onscreen, they were ready to crack each other’s heads offscreen.

Shepard and Willis straight up hated each other. And those aren’t our words -- Shepard said that bluntly to Entertainment Weekly. According to crew members, Shepard was too high maintenance and Willis was too casual. At one point, Shepard even slammed a bookcase into a door by Willis.

William Shatner and Everyone - Star Trek

He was the captain of the ship. But that didn’t stop everyone from wanting to mutiny.

William Shatner became a TV icon in the original Star Trek series, playing that lovable rogue Captain Kirk. And all of his co-stars, at one point or another, detested their captain’s behavior.

Leonard Nimoy watched as Shatner took lines from Spock, so Kirk didn’t seem too dumb. George Takei (Sulu) watched as Shatner iced him from on-set conversations and friendliness. And Nichelle Nichols (Uhura) got so fed-up with Shatner she nearly quit, until Dr. Martin Luther King, Jr. convinced her to stay.

Tommy Lee Jones and Jim Carrey - Batman Forever

After they shot the superhero fever dream Batman Forever together, Tommy Lee Jones delivered an insult to Jim Carrey.

But not just any insult. The perfect insult. One that feels specific and unique to Tommy Lee Jones. One we’re not sure how Carrey recovered from.

Carrey played The Riddler. Jones played Two-Face. And when they reunited by chance at an LA restaurant, Jones said: “I hate you. I really don’t like you. I cannot sanction your buffoonery.”

DEVASTATING.

Carrey later guessed it was because Dumb and Dumber had beaten Jones’ Cobb at the box office.

Julia Roberts and Steven Spielberg - Hook

The biggest director on the planet paired with the biggest star. What could possibly go wrong? Well, on the set of Hook, Steven Spielberg’s postmodern take on the Peter Pan story, Julia Roberts saw exactly what went wrong. Her Tinkerbell didn’t just have pirates to deal with.

Spielberg and Roberts fought regularly, with Roberts earning an unfortunate on-set nickname: Tinkerhell. Later, both parties told their side of the story: Spielberg told 60 Minutes “it was an unfortunate time for us to work together.” Roberts told Vanity Fair that she “had a turncoat in my midst.”

Jamie Foxx and LL Cool J - Any Given Sunday

In Any Given Sunday, Oliver Stone’s star-studded football melodrama, two musicians-turned-actors gave each other quite the tackling.

Jamie Foxx and LL Cool J play teammates who grow resentful of each other during the season. We bet it was not terribly difficult for them to access these emotions.

During an argument scene, Foxx asked if LL would take it easy. LL refused. So, Foxx punched him. LL responded surprisingly rationally, saying they should both cool it. And then -- LL punched Foxx so hard he passed out.

Hey, LL Cool J’s mama: Stop telling him to knock people out!

Val Kilmer and Tom Sizemore - Red Planet

Val Kilmer and Tom Sizemore. Two actors with notoriously big egos. So big, that they had to travel to Mars to try and contain them. It... did not work.

Red Planet is a jumbled piece of sci-fi suspense. Would a documentary about Sizemore and Kilmer’s on-set behavior be more interesting?

Kilmer found out Sizemore made the studio ship his exercise machine to set. So he reminded Sizemore he was making ten million to Sizemore’s two. Sizemore threw one of his weights at Kilmer, and they began physically fighting. Eventually, they agreed not to be on set at the same time.

Marlon Brando and Francis Ford Coppola - Apocalypse Now

It’s a miracle that Apocalypse Now exists. The 1979 masterpiece was a filmmaking apocalypse for director Francis Ford Coppola, who dealt with lead actor heart attacks, set-destroying rainstorms, and constant lapses in funding. At the center of all this drama?

The horror… the horror… of Marlon Brando.

Brando, playing the mad Colonel Kurtz, showed up to set knowing none of his lines, seemed disoriented, and had gained a massive amount of weight. So Coppola begrudgingly rewrote the script, fed Brando lines through an earpiece, and shot him in complete darkness. They never worked together again.

Will Smith and Janet Hubert - The Fresh Prince of Bel-Air

Now this is a story all about how Aunt Viv got replaced halfway through The Fresh Prince of Bel-Air.

In the first three seasons, Will Smith’s aunt is played by Janet Hubert. For the rest of the run, Daphne Maxwell Reid. What family shenanigans went down?

Smith was the star. The titular “fresh prince.” But as he told the Atlanta Journal in 1993, Hubert behaved like a difficult diva, effectively wanting it to become “The Aunt Viv of Bel-Air Show.” When Hubert became pregnant, Smith made his move, and got producers to fire and replace her.

Edward Norton and Tony Kaye - American History X

If you’ve seen American History X, you know how it burrows under your skin with its depiction of violence and hatred. But if you were to ask director Tony Kaye what he thinks, he’d probably say it’s not his movie.

He’d probably say Edward Norton stole it from him.

When Kaye delivered his final cut to the studio, they froze. It was not the movie they were looking for. So, Norton helped edit a new version without Kaye’s input or consent. Kaye publicly disowned the final movie, and tried to get his directing credit replaced with “Humpty Dumpty.”

Chevy Chase and Dan Harmon - Community

We’ll cut to the chase: Not many people have kind things to say about Chevy Chase, the iconic comedian known from Saturday Night Live and Caddyshack. Dan Harmon probably knew his reputation when he cast him as a series regular on Community. And if he didn’t, he found out quickly.

Chase would regularly walk off set early. He made problematic jokes toward Donald Glover. And he regularly left vulgar voicemails for Harmon, criticizing the show’s overall quality. Harmon responded by playing the voicemails at wrap parties for everyone to hear, and Chase wound up leaving the show in 2012.

Bruce Willis and Kevin Smith - Cop Out

After years of making his own unique films, writer/director Kevin Smith was finally being given a big-budget studio flick: Cop Out, a Bruce Willis-Tracy Morgan buddy cop action-comedy. Smith and Willis became friends while co-starring in Live Free or Die Hard, and Willis recommended Smith for the gig.

But when cameras rolled, tempers flared.

Willis thought Smith was slacking, behaving too casually. Smith thought Willis was uncooperative, leaving Morgan out to dry. Once, when Willis asked to review a take, Smith made a sarcastic joke about Willis being the real director -- and the entire set had to be cleared.

Isaiah Washington and T.R. Knight - Grey’s Anatomy

Sometimes, no matter how many storylines you pack into a TV show, the biggest drama will be behind the scenes.

Grey’s Anatomy, Shonda Rhimes’ medical juggernaut, experienced this firsthand in 2007 when everyone found out what one TV doctor, Isaiah Washington, said to another, T.R. Knight.

During a fraught rehearsal, Washington used a homophobic slur to express his frustrations with Knight. Knight, who had not yet opened up about his sexuality, was beyond offended, and the story became public. Washington was fired from the show, and began an anger-fueled non-apology tour.

Julia Roberts and Nick Nolte - I Love Trouble (1994)

By the end of production on I Love Trouble, a screwball romantic comedy, stars and onscreen lovers Nick Nolte and Julia Roberts were so frustrated with each other, they were publicly throwing around words like “not a nice person” and “disgusting human being.”

Uh… what the heck happened?

For his part, Nolte knew from the beginning he didn’t like the movie he signed up for, comparing it to selling his soul. His tension apparently spilled over to Roberts, who hated the experience so much, she called him the worst actor she ever worked with.

Nathan Fillion and Stana Katic - Castle

In season six of Castle, the comedic drama about an author who helps solve crimes, Castle and Beckett finally get married, settling a series-long “will they, won’t they” relationship. Ironically, behind the scenes, their actors were growing further and further apart.

Nathan Fillion played Castle, Stana Katic played Beckett. And as Katic’s star rose, Fillion resorted to unorthodox measures.

He insisted scenes between them remain short, and refused to be on set with her unless absolutely necessary. Fillion even got Katic fired before the ninth season, but the show was cancelled instead.

Megan Fox and Michael Bay - Transformers

A huge director and a huge star making a huge movie about huge robots. Transformers was a huge box office hit, kickstarting a new film franchise. But the huge star, Megan Fox, and the huge director, Michael Bay, could disguise their mutual dislike no longer.

Fox publicly lambasted Bay for a number of unprofessional, sexist incidents on set, including his insistence she gain 10 pounds. She even compared working under Bay to working under an evil dictator. Bay, cosigned by an anonymous letter of Transformers crew members, fired Fox before the third film began.

Bill Murray and Lucy Liu - Charlie’s Angels (2000)

The Bill Murray appeal isn’t just his TV and film work. It’s his mystique. His phone line he makes filmmakers leave messages on if they want to cast him. His tendency to crash private events. His bluntly mean attitude on set.

Wait… what’s that last one about?

In the 2000 big-screen Charlie’s Angels adaptation, Murray pointed at Drew Barrymore and Cameron Diaz, and told them they had talent. Then he pointed at Lucy Liu. And told her she couldn’t act.

Liu rushed at Murray and attacked him. Unsurprisingly, Murray was replaced by Bernie Mac in the sequel.

Ryan Gosling and Rachel McAdams - The Notebook

Their onscreen love story was so passionate, they made The Notebook into a modern classic. But Ryan Gosling and Rachel McAdams weren’t exactly on the same page while filming the 2004 romance. In fact, director Nick Cassavetes had to oversee some “surprise couples therapy.”

During one scene, a frustrated Gosling pulled Cassavetes aside and asked if they could replace McAdams off-camera. Cassavetes instead forced the two actors to go into a room together and not come out until they were cool.

After lots of screaming, they emerged, and the shoot went as planned.

Jamie Dornan and Dakota Johnson - Fifty Shades of Grey

Let’s be frank: the Fifty Shades of Grey franchise is about two people who get intimate with each other. A lot. Like, multiple graphic scenes. So it would behoove the filmmakers to hire actors who sorta like each other, right?

Well, you’d be fifty shades of wrong with that assumption.

Dakota Johnson said she’s still unsure if she made a mistake playing Ana Steele. Jamie Dornan said he’s tired of showing off his body playing Christian Grey. And many on-set reports said the two were always upset and awkward with each other due to clashes in work ethic.

Claire Danes and Leonardo DiCaprio - Romeo + Juliet

There aren’t many characters that symbolize love more than Romeo and Juliet, the centers of William Shakespeare’s star-crossed tragedy. But for Leonardo DiCaprio and Claire Danes in Baz Luhrmann’s 1996 adaptation, it was less “love” and more “can we drink that vial of poison and be done already?”

Straight up, the two actors wouldn’t speak to each other when they weren’t filming. And it’s mostly because of DiCaprio’s tendencies to goof around and even prank people on set. Even though Danes was only 16 at the time, she found DiCaprio annoyingly immature, whereas DiCaprio found her annoyingly stubborn.

Lea Michele and Naya Rivera - Glee

If you’ve ever sung in a high school choir, you know how much drama lurks behind those vocal arrangements. High tempers, bruised egos, and puberty-ravaged hormones all play a factor. And on the set of Ryan Murphy’s high school choir drama Glee, life imitated art in a serious way.

Lea Michele played central character Rachel Berry. And when Naya Rivera’s Santana got featured in more central storylines, Michele wasn’t happy. She and Rivera started openly criticizing each other on set, to the point where they could no longer speak. Rivera eventually left the show before its run was over.

Kate Winslet and James Cameron - Titanic

Titanic was a game-changer for Kate Winslet. It made a boatload of money, earned her an Oscar nomination, and made her a superstar. And Winslet refused to work with her director, James Cameron, for more than 20 years after.

How did this ship sink so dramatically?

Among his general directing style of “screaming at her all the time and putting her in situations where she could literally drown,” Cameron gave Winslet this super-respectful nickname: “Kate Weighs-a-Lot.”

However, they are reuniting in the Avatar sequels, so it looks like their hearts will go on.

Wesley Snipes and Everyone - Blade: Trinity

Wesley Snipes had brought the vampire-hunting superhero Blade to life in two enjoyable installments. The third one should’ve been a victory lap, right? Wrong. Dreadfully, borderline-comically wrong. By the end of production, Snipes had a vendetta against everyone, from cast to crew.

He would routinely refuse to shoot scenes -- his stand-in had to be used for many key shots. He wouldn’t talk to anyone, instead having his assistant pass notes. And he even sued the production company for giving too much screen time to costars Ryan Reynolds and Jessica Biel.

Harrison Ford and Josh Hartnett - Hollywood Homicide

It was supposed to be a symbolic passing of the torch, with Harrison Ford effectively telling his audience, “Josh Hartnett is the new me.” Instead, buddy cop action-comedy Hollywood Homicide fizzled with audiences, and caused a rift between its two stars.

Ford and Hartnett refused to look at each other in the eyes. Even when they were talking to each other in a scene. And when they decided to speak to each other, their words were pointed: Ford called Hartnett a “punk” and Hartnett called Ford an “old fart.”

Bill Murray and Harold Ramis - Groundhog Day

Is Groundhog Day a silly comedy? Or is it an existential rumination on what it means to be alive? It’s a fun question to debate about with your friends. But on the set of the film, it nearly ruined the relationship between star Bill Murray and director Harold Ramis.

Murray was going through personal issues. And he took it out on Ramis. Murray kept pushing for more dramatic scenes, Ramis kept trying to keep it funny. While the resulting movie is a classic, the two men didn’t speak for 20 years after, until Murray reached out just before Ramis died.

Shia LaBeouf and Tom Hardy - Lawless

Lawless should have just been a reference to the world of the film, a gritty drama set during Prohibition. Instead, it could aptly describe the relationship between costars Shia LaBeouf and Tom Hardy. When two intense method actors meet, something wild is bound to ensue.

Everyone who worked on the film agrees that LaBeouf and Hardy’s relationship got so fractured, they wound up physically fighting each other. After that fact, the stories differ. Hardy insisted that LaBeouf knocked him unconscious. But director John Hillcoat said they were separated before that could happen.

Val Kilmer and Marlon Brando - The Island of Dr. Moreau

The production of The Island of Dr. Moreau was so bonkers, it inspired a documentary called Lost Soul. Budget issues, directors being fired, actors threatening to quit -- every day was a new nightmare for the cast and crew.

At the center of this madness? Marlon Brando and Val Kilmer.

Kilmer would bully anyone in sight, refusing to shoot scenes as written. Brando would hole up in his trailer, only performing scenes with an earpiece feeding him lines. And both actors would play “movie star chicken” with each other, refusing to come to set before the other one arrived first.

Richard Dreyfuss and Robert Shaw - Jaws

The movie about a shark was quite a bear.

Steven Spielberg’s revolutionary blockbuster was beset by issues, including the fact that their mechanical shark (you know, the focus of the film) would rarely work. At least the two shark-hunters could get along in their common goal, right? Um…

Robert Shaw, who played shark-hunter Quint, had a tendency to abruptly leave production, get drunk while shooting, and antagonize his costar Richard Dreyfuss, whom he viewed as a prissy theatre actor. Spielberg, with not much other choice, decided to incorporate their fighting into their characters' onscreen relationship.

Kenny Baker and Anthony Daniels - Star Wars

This one’s a heartbreaker.

The actors who played robo-BFFs C-3PO and R2-D2 don’t like each other? To quote Luke Skywalker, “That’s not true! That’s impossible!” R2-D2 actor Kenny Baker spilled all the tea about his relationship with C-3PO actor Anthony Daniels, and the tea is strong.

Apparently, Daniels is a generally awkward, mean-spirited person. Baker expressed interest in the two of them touring conventions together. And Daniels told him, “Go away, little man,” a rude reference to Baker’s height. Their fractured relationship continued on every Star Wars film they made together until Baker’s death in 2016.

Jamie Foxx and Michael Mann - Miami Vice

How did an adaptation of a silly 1980s cop drama get so crazy? Because director Michael Mann, who created the original Miami Vice, wanted to make his big-screen update as serious as a heart attack. And his unorthodox shooting style ruffled the feathers of Jamie Foxx.

Mann wanted to shoot, among other circumstances, in the middle of actual hurricanes with actual gang members running around. After one shoot day resulted in real gunshots being fired, Foxx abruptly quit production, forcing Mann to rewrite an ending. Additionally, Foxx fought over salaries and billing with costar Colin Farrell.