What if we told you that your favorite on-screen BFFs, lovers, or even rivals didn’t really get along in real life either? Could you forgive us for ruining your childhood? Could you get over the soul-crushing disappointment? We certainly hope so, because it just so happens that the frenemy complex is much more common off-screen than you’d think, especially in the realm of television drama.

From name-bashing and egotistical outbursts, to cat-fights and violent physical altercations, some TV co-star pairs cannot stand pretending like they like each other off-screen. So hold on to your heartstrings, people, because you’re going to have to try real hard not to cry when you learn which stars from your fave shows like Gossip Girl and Gilmore Girls didn’t get along IRL.

Check out our gallery below to see which surprising TV co-stars had it out for each other when the cameras stopped rolling.

15 Celebrity TV Co-Stars Who Disliked Each Other in Real Life

Stana Katic & Nathan Fillion

There seemed to be too much drama going on in the kingdom for Castle stars Stana Katic and Nathan Fillion, because last month it was announced that Katic would be exiting the show due to “behind-the-scenes friction,” Us Weekly reported.

Apparently the tension between the two got so thick that the pair were made to attend couples counseling together. While Katic’s rep (obviously) points the finger at Fillion to blame for her departure, he nor his camp have chosen to respond.

Audrina Patridge & Lauren Conrad

Conrad and Patridge met on the set of The Hills back in 2006, becoming friends and roommates on the MTV “reality show,” but the two went their separate ways once the cameras were off. Patridge even admitted to Celebuzz in 2012 that she doesn’t see or talk to Conrad much at all; they apparently had “a little bit of a falling out,” she said.

And if the ex-friendship wasn’t clear enough: Patridge didn’t receive an invite to Conrad’s wedding either.

Shannen Doherty & Alyssa Milano

Milano and Doherty’s relationship on the show Charmed was anything but, and the animosity between the two co-stars became pretty obvious as more rumors surfaced about their alleged feud.

Milano has been very outspoken about her “rough days” filming with Doherty — who exited the show in 2001 — even equating the cattiness that went on behind the scenes to typical high school drama.

Blake Lively & Leighton Meester

Another pair of co-stars plagued with having to pretend to be BFFs all the time are Lively and Meester, who are supposedly no longer on speaking terms to this day.

Considering how often their characters clashed on Gossip Girl, we can sort of imagine the same tension would play out after 18-hour work days with each other.

Another unfriendly rumor suggested that the friendship finally evaporated when Lively didn’t congratulate Meester on her engagement to Adam Brody.

Will Smith & Janet Hubert

Hubert’s infamous dispute with Smith behind the scenes of filming the hit ‘90s sitcom The Fresh Prince of Bel Air ultimately resulted in Hubert being fired and replaced between seasons three and four. Supposedly, the decades-long feud stems from Smith turning down her proposal to help get the cast a raise in pay.

While Smith rarely discusses the rumored incident, Hubert is very vocal about what happened; she’s even called him an “ego maniac” and an “a**hole.” Yikes!

Jennette McCurdy & Ariana Grande

McCurdy said she had no bad blood with her Sam & Cat co-star Grande but admits that there were times the two "butted heads,” though in a “sisterly way."

However, on an episode of McCurdy’s web series What’s Next for Sarah, she introduces a character with an unsettlingly high-pitched voice and an obsessive interest in all things sparkly.

Her name? Gloriana. Coincidence? We think not. Shade? Absolutely.

Lauren Graham & Scott Patterson

Gilmore Girls fans may be disappointed to know that Luke and Lorelai actually didn’t like each other off-screen, and the two were okay with this realization. Oh, and in case you thought there was ever a chance for reconciliation, think again.

When asked by TV Guide whether she and Patterson were “best friends,” Graham shot the suggestion down with a swift “No.” Childhood. Ruined.

Kim Cattrall & Sarah Jessica Parker

Can you imagine having to pretend that you’re BFFs with someone you couldn’t stand for nearly a decade? This was the case for Cattrall and Parker, who portrayed on-screen BFFs on HBO’s Sex and the City from 1998-2004.

Their relationship became less than bestie-like once Cattrall found out Parker had made more money than she and the rest of the cast.

Shannen Doherty & Jennie Garth

The infamous BFF blowout between 90210’s Garth and Doherty will probably damage Brenda and Kelly shippers for years to come. Garth and fellow co-star Tori Spelling have both spoke out publicly about their problems with Doherty off set.

In fact, Garth went on to write a book called Thoughts from a Hollywood Blonde, where she touched on her relationship with Doherty and how the two sometimes wanted to “claw each other’s eyes out.”

Lea Michele & Naya Rivera

Michele and Rivera were allegedly involved in a crazy altercation on the set of Glee which ended in one of the stars being kicked off the set for their “diva-like” behavior. There was never any public affirmation or explanation for what happened, but what’s more telling is what transpired afterwards.

Apparently, more rumors spread that it was by Michele’s influence that Rivera was written out of the show’s fifth season.

Patrick Dempsey & Isaiah Washington

A heated argument between Grey’s Anatomy co-stars Washington and Dempsey got so intense that it came to blows when Washington assaulted Dempsey during the mayhem.

Washington didn’t make things any better for himself by insulting his fellow co-star T.R. Knight with gay slurs, which more or less contributed to Washington being written off the series.

Victoria Justice & Ariana Grande

Grande and Justice played friends on Victorious but it was rumored to be a whole ‘nother situation off-screen. The stars reportedly trash talked one another, even going as far to have a subliminal media war of sorts when addressing why the show came to an end.

”[Victorious] ended because one girl didn’t want to do it. She chose to do a solo tour instead,” said Grande in response to accusations that she was to blame for the show’s cancellation. Proving two could play that game, Justice issued this Tweet that seemed more or less a response to Grande’s remarks: "Some people would throw some1 that they consider a friend under the bus just 2 make themselves look good. #StopBeingAPhony #IfTheyOnlyKnew."

Nicki Minaj & Mariah Carey

Bruised egos while shooting American Idol Season 12 eventually led to Carey and Minaj’s ongoing bitter rivalry.

Evident both on and off screen, there was a lot of backhanded (albeit hilarious) shade, violent threats and side-eyes exchanged between these two.

Needless to say, the divas will probably never reconcile.

Sophia Bush & Chad Michael Murray

Murray and Bush are living proof that business and pleasure should never come together. After meeting on the set of One Tree Hill, the two wedded only to divorce a year later after it was alleged that Murray cheated on Bush with Paris Hilton while filming House of Wax.

What’s even more cringeworthy is that the lovebirds-no-more had to work another five years together…

Lindsay Lohan & America Ferrera

Lohan’s Ugly Betty gig came to an abrupt end after reports circulated that she had butted heads with show star Ferrera.

Evidently it was Lohan’s attitude in general that thwarted her on screen (and probably off screen) chemistry with Ferrera after one of the scenes they filmed together went unexpectedly, and explicitly, wrong.

Comically enough, Lohan’s character was Betty’s high school nemesis, though other reports suggest Ferrera’s treatment of Lohan wasn’t very friendly either — which eventually led to her being booted from the show.