Ever started a new job and instantly taken a disliking to one of your new colleagues?
It may be down to something as simple as the fact they completely mispronounced your name upon first meeting or perhaps your personalities just don't mesh in the way you would have hoped. Regardless of this immediate disdain, you still have to turn up to work each day and be civil with said person because that's your job.
But, what if you're a big time Hollywood actor working on a potential blockbuster hit? Do these same rules apply to you?
Whether it's due to a disagreement about a scene, a clash of philosophies or even a top star gyrating in a g-string, if a pair of actors don't see eye to eye they have been known to flex their A-list muscles and flat out refuse to be on the same set together going forward.
These on-set feuds have forced stand-ins into pivotal scenes, seen famous actors fired off projects and even affected some thespians' chances of landing another meaty role in the future.
All because two professional pretenders didn't want to fake liking each other for a while.
10. Sylvester Stallone And Richard Gere - The Lords Of The Flatbush
Sometime before both stars were the household names we know today, Sylvester Stallone and Richard Gere were both cast in a coming-of-age drama known as The Lords of the Flatbush (1974).
Stallone would be playing Stanley Rosiello and Gere had landed the lead role of David 'Chico' Tyrell.
Yet, as those who have seen the flick will already know, Gere did not end up appearing in the finished feature when it hit screens.
This was down to the fact that the two future superstars didn't exactly get along during the early stages of production and one incident in particular forced the film's director to 'make a choice', as Stallone put it.
After Gere entered a car post-rehearsal with a greasy half-a-chicken and plonked himself next to the soon-to-be 'Italian Stallion', Stallone warned him not to get any grease on his pants. Gere apparently told him not to worry about, but still ended up splashing mustard on his co-star's thigh. This led to Stallone elbowing him in the head and booting him out of the vehicle.
Before long Gere was given his marching orders and Perry King was brought in to take over his role.
Over 40 years later, the Hollywood legends have yet to bury the hatchet... or chicken...