Certain personality types just don't gel and will always have differences when it comes to work ethic and how you go about getting the job done.
Whether or not you're facing your own office conflict, take solace in the fact that even celebrities have had co-worker disagreements or tiffs.
Here, some co-star pairs that had us fooled on-screen but weren't so chummy behind the scenes.
Lea Michelle and Naya Rivera
Much like their indifference to each other in earlier seasons of Glee, these two strong-willed ladies butt heads, proving that similarities don't always mean that you'll get along with someone. Rivera addressed rumours of an ongoing feud in her memoir.
"One of the Glee writers once said that Lea and I were like two sides of the same battery and that about sums us up. We are both strong-willed and competitive - not just with each other but with everyone - and that's not a good mixture."
Blake Lively and Leighton Meester
Famous BFFs and occasional frenemies Serena Van Der Woodsen and Blair Waldorf set the tone for friendship goals for teenage girls everywhere on Gossip Girl, but apparently the pair weren't so close IRL.
Sources have picked up on the fact that B and L haven't seen each other since filming of Gossip Girl wrapped up, but boil it down to being too familiar with one another on set.
Ariana Grande and Victoria Justice
When their Nickolodeon show Victorious was coincidently not-so-victorious, Grande pointed the finger at her co-star to blame for its cancellation.
"Sweetheart the only reason Victorious ended is because 1 girl didn't want to do it," she wrote on social media. "She chose to do a solo tour instead of a cast tour. If we had done a cast tour Nickelodeon would have ordered another season of Victorious while Sam and Cat filmed simultaneously but she chose otherwise. I'm sick of this bs."
What a Grande exit.
America Ferrera and Lindsay Lohan
The relationship got a little ugly when Lindsay came to guest star on America's show Ugly Betty. There are allegations from both sides, but Lindsay was apparently so much of a diva on-set that America lobbied to have her six promised episodes cut down to four. Ouch.
Ryan Gosling and Rachel McAdams
You might want to grab some popcorn for this one. After depicting absolute couple goals with their "You're-a-bird-I'm-a-bird" love and devotion on The Notebook, the pair eventually fell for each other off-screen. However things weren't alway so idyllic, with an argument causing Gosling to request that his director bring in another actress for him to run lines with.
"Maybe I’m not supposed to tell this story, but they were really not getting along one day on set," director Nick Cassavetes reveals. "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.”
Leonardo Dicaprio and Claire Danes
Romeo oh Romeo, these two were not such the loved-up couple they portrayed. Quite the opposite, actually. Reportedly, Claire was frustrated with Leo's cheeky tendency to prank the cast and crew, and Leo thought she was 'uptight'.
This article originally appeared on marie claire.