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Bette Davis & Joan Crawford, "Whatever Happened to Baby Jane?"

With these two making up one of the most legendary rivalries on-screen, it would only make sense that tensions carried on off-screen. According to , the feud began when Crawford, who was bisexual, made advances towards Davis and was turned down. Regardless of their mutual hate for each other, "What Ever Happened to Baby Jane?" was a smashing success and the two attempted to reunite in "Hush…Hush, Sweet Charlotte." However, just days after filming started, Crawford quit the film. In the years to follow, their infamous feud by British playwright Malcom McKay in "Bette and Joan."

Debra Winger & Richard Gere, "An Officer and a Gentleman "

The two played lovers in the 1982 drama, but the love stopped as soon as their screen time ended. Winger claimed that Gere was a "brick-wall co-star," and that she still doesn't look back fondly on the film.

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Kenny Baker & Anthony Daniels, "Star Wars"

Although they played (robot) friends R2-D2 and C-3PO on-screen, Baker and Daniels couldn't have been less so. The feud when Baker attempted to say hello to Daniels one morning early in filming, and Daniels turned his back on him, stating "Can't you see I'm having a conversation?" This struck a chord with Baker: "It was the rudest thing anyone had ever done to me. I was furious. It was unbelievable." This early scuffle set the tone for the rest of their filming relationship, Baker later saying in 2006: "We were both in our droids; there was no interconnection at all. We couldn't hear or see each other." And it seems they were both fine with that.

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Shannon Doherty & Jennie Garth, "Beverly Hills, 90210"

Brenda and Kelly played BFFs on "Beverly Hills, 90210," but the actresses who played them were not so close off-screen. there were times during filming when they wanted to "claw each other's eyes out." However, despite the rumored tension, the two were later able to come together and appear in the "90210" spin-off.

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Patrick Swayze & Jennifer Grey, "Dirty Dancing"

"Dirty Dancing" stands as one of the most romantic film of the '80s (and of all time), but off-screen things weren't as peachy. In , "The Time of My Life," he reveals how he didn't get along with his character's romantic interest on set. Apparently, Grey was "highly emotional" and prone to "silly moods," which he found to be unprofessional, and caused a subsequent rift between the two co-stars.

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Debra Winger & Shirley MacLaine, "Terms of Endearment"

"Terms of Endearment" swept the 1984 Academy Awards, and the tension between the two star actresses off-screen was award-worthy as well. With both actresses initially having reputations of being difficult, things were bound to start off on the wrong foot. hated each other so much that they got into physical altercations; and when both were nominated for the Best Actress Oscar, it only added fuel to the fire. MacLaine would go on to win, and famously shouted "I deserve this!" when her name was called over Winger's that night.

Will Smith & Janet Hubert, "The Fresh Prince of Bel-Air"

While "The Fresh Prince of Bel-Air" seamlessly tried to replace Aunt Viv midway through the show, viewers wouldn't let it go unnoticed. , her dismissal was all Smith's doing in 1993 when she was fired and replaced by Daphne Reid. Hubert later called Smith an "egomaniac," and stated that he is the only reason she would never do a "Fresh Prince of Bel-Air" reunion.

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Julia Roberts & Nick Nolte, "I Love Trouble"

"Trouble" was truly the choice word when these two played onscreen lovers in the 1994 rom-com "I Love Trouble." began flying even before the film came out, claiming that Roberts found Nolte to have a machismo attitude, after which Nolte was driven to agitate Roberts even more. Apparently their dislike for each other became so intense, the two ended up having more scenes with their stand-ins than with each other.

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Claire Danes & Leonardo DiCaprio, "Romeo and Juliet"

In Baz Luhrmann's 1996 film adaptation of "Romeo and Juliet," Danes and DiCaprio played two of the most iconic lovers in history. But, off-screen, things could not have been less romantic. , Danes found DiCaprio "irritatingly immature," as he became known for playing pranks on the cast and crew members. On the other hand, DiCaprio found Danes "annoyingly reserved and uptight." In real life, these two "star-crossed lovers" were just a set of cross stars.

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Bill Murray & Lucy Liu, "Charlie's Angels"

Bill Murray has long been known as one of the most lovable, comedic legends �� it only makes sense that he would get along with any and every co-star. Not true when it came to Lucy Liu. Apparently while rehearsing a scene, in which Murray insulted Liu and the delivery of her lines. Murray would later forgo appearing in the Charlie's Angels sequel.

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Jaime Foxx & LL Cool J, "Any Given Sunday"

, the physical fighting between the two actors got so out of hand at one point that the police had to get involved. The two have since put their differences aside, Foxx : "When you're grown, you don't really have time for all that [beefing]. When you're young, it's cool to have your emotions on your chest. But we're grown now."

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Rachel McAdams & Ryan Gosling, "The Notebook"

While the two made one of the most romantic on-screen couples of all time, things apparently had a rocky start, and reports state that Gosling frequently complained about McAdams. In with writer and director Nicholas Sparks, he stated: "Maybe I'm not supposed to tell this story, but they were really not getting along one day on set. Really not. And Ryan came to me, and there's 150 people standing in this big scene, and he says, 'Nick come here.' And he's doing a scene with Rachel and he says, 'Would you take her out of here and bring in another actress to read off camera with me?' I said, 'What?' He says, 'I can't. I can't do it with her. I'm just not getting anything from this.' After an impromptu therapy session, the two actors were able to work things out, so much so that they even dated off-screen once filming wrapped from 2005 to 2007.

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Kim Cattrall & Sarah Jessica Parker, "Sex and the City"

Despite playing best friends in the series, the two apparently ignored each other any time they weren't filming scenes for the show. However, since the franchise ended, both have to long and exhausting days on set. Cattrall stated: "19-hour workdays are stressful, whether you're driving a truck, working in a coal mine or on a set and trying to be your brightest at 4 o' clock in the morning. But there's a camaraderie that happened through all of that." Sarah Jessica Parker also once stated in an interview with Marie Claire, "There are times when all of us have been sensitive and sometimes feelings get hurt. But I don't have any regrets about how I've treated people."

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Shia LaBeouf & Tom Hardy, "Lawless"

According to surrounding the boozy, bloody prohibition film, Hardy claimed that LaBoeuf knocked him out behind the scenes. However, LaBoeuf later came out saying that it was all part of the "brotherly bond" they shared on set. "Oh, it was all love. I love the dude like a brother, straight up," LaBeouf insisted.

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Charlie Sheen & Selma Blair, "Anger Management"

While Charlie Sheen already has a reputation for rubbing people the wrong way, he especially did so with Selma Blair on the set of "Anger Management." According to reports, Sheen got Blair fired from the comedy after hearing that she was complaining about his work ethic. According to Blair, an "explicit text message" relaying the news that she had been fired from the show. Bad blood, indeed.

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Naya Rivera & Lea Michele, "Glee"

Two two allegedly found it hard to get along since filming started in 2009, things escalated even more in 2014 when the actresses had on set. Michele apparently wanted Rivera off the show and soon after Rivera was written out in the final two episodes of season five and didn't return for the sixth and final season of Glee.

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Russell Crowe & Oliver Reed, "Gladiator "

While "Gladiator" became an instant classic, it didn't go without tension between Crowe and Reed off-screen. Crowe of Reed's sloppy drinking habits and bad behavior and claimed that they "never had a pleasant conversation." Reed sadly died while filming the 2000 film.

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Teri Hatcher & Marcia Cross, "Desperate Housewives"

While "Desperate Housewives" portrays a group of friends, it is also full of deception and drama; drama which carried over to the actors' off-screen relationships. , Hatcher was always "the loner" of the group, and felt particularly removed from Cross. The two apparently got in a scuffle during a Vanity Fair shoot because Hatcher was placed front and center. Reportedly, Hatcher's name was left off of the "goodbye gift" given at the end of the series.

James Franco & Tyrese Gibson, "Annapolis"

While this film ran a bit under the radar with audiences, the between Gibson and Franco caught full steam. During a Playboy interview in 2007, Gibson commented on Franco, stating, "I never want to work with him again, and I'm sure he feels the same way. It felt very personal." Franco later responded to Complex magazine, stating that he took nothing personally. "We've made up, or I tried to make up with him. Maybe I was too into that role. I don't try to be mean to anybody on a movie."

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Harrison Ford & Josh Hartnett, "Hollywood Homicide"

With a legend like Harrison and a dreamboat like Josh Harnett coming together in an action-filled drama, you would hope the two would become best buds, but that wasn't the case in "Hollywood Homicide." Ford and Hartnett apparently , Ford calling Hartnett a "punk," while Harnett struck back and called Ford an "old fart." Hartnett later admitted that the two would barely make eye contact with each other on set.

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