Castle and BeckettDo you like everyone you've ever worked with? Even the most chilled-out people butt heads with others sometimes. That tension only gets worse if you're forced to spend a ton of time together while filming. No, not all co-stars are friendly all the time, even if they play two peas in the proverbial pod on TV.

The real-life tiffs between actors can be difficult for fans to digest. As much as you worship the stars of your favorite shows, you also want to believe that some of the relationships playing out on screen are equally poignant and close behind the scenes. These six sets of feuding television cast-mates prove that the stars really are like regular people: Sometimes, they just can't get along.

1. 'The Good Wife' (2009 - )

What wouldn't a fan of the sexy legal drama do to find out what really went on between Julianna Margulies and Archie Panjabi? The reported conflict between the two actresses is shrouded in mystery; neither has spoken out about it in detail. But eagle-eyed viewers caught episodes that went by where the actresses' characters strangely didn't share a scene. Eventually Kalinda (Panjabi) was written off the show; she and Alicia (Margulies) met for one last drink in a sequence that the creators of "The Good Wife" later admitted was a composite of two takes shot with each actress separately.

2. 'Charmed' (1998 - 2006)

Alyssa Milano and Shannen Doherty played sisters on the supernatural drama, "Charmed," but they didn't feel much of a familial bond off-set. When Milano was asked about issues leading up to Doherty's departure after three seasons on "Watch What Happens: Live," she compared the filming experience to being in "high school" and confirmed that there "were definitely some rough days."

3. 'Castle' (2009 - )

Recent events lend credibility to rumors that the heavily shipped core couple of the romantic procedural "Castle" are far from in love in real life. Stana Katic, who plays Captain Kate Beckett, was not invited to renew her contract if the show returns for Season 9. An unnamed source told US Weekly that the state of her TV union with co-star Nathan Fillion was so bad that producers actually sent the pair to couples counseling.

4. 'Desperate Housewives' (2004 - 2012)

The stars of "Desperate Housewives" were probably desperate for some time away from each other. The leading ladies of the prime-time soap had roller-coaster friendships on the show. The drama went on off-camera too, as Felicity Huffman, Eva Longoria, and Marcia Cross were frequently at odds with co-lead Teri Hatcher. The truth was printed literally in black and white when the other three ladies left Hatcher's name off of a farewell gift to the show's crew.

5. 'The X-Files' (1993 - )

The duo from "The X-Files" have patched things up in the years since the sci-fi phenomenon's original run, but David Duchovny and Gillian Anderson weren't buddy-buddy in the early days of Mulder and Scully. The stars acknowledged the controversy on "Jimmy Kimmel Live" during the press tour for the show's revival, joking to the host that the core of the problem was that Anderson's hair issues would require long breaks between takes. Now, the gossip about the two has pretty much done a 180 -- many fans are certain that the co-stars are actually dating.

6. 'Grey's Anatomy' (2005 - )

A tussle between Patrick Dempsey and Isaiah Washington on the set of the massively popular medical drama -- "Grey's Anatomy" -- dominated entertainment news after Washington's use of a homophobic slur during the fight became public knowledge. The word was said in reference to cast-mate T.R. Knight, whose lateness to set was the subject of Dempsey and Washington's argument. Washington issued an apology in People, but was later fired from the series.

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