You would hope that the world of the 80s action movie was one of chummy camaradarie and big, veiny, muscle-bound cuddles.
Sylvester Stallone has revealed that he had a 'violent hatred' of his rival Arnold Schwareznegger back in the old days.
“We had violent hatred,” Sly told David Letterman.
“Have you ever had that ever? Competition where you really had an arch enemy that kind of brings out the best in you.
“As Arnold would say, it really pushed you to accelerate.”
Sly added that he hated 'that [Schwarzenegger] was on the planet, basically'.
“After a while, I started to like this competition, this one-upmanship. He'd get a bigger gun. I'd shoot more people. He'd shoot more people. But then, he went into science fiction, which kind of left me behind.”
It seems that the pair have put their differences aside, however.
As well as having starred in Stallone's 'The Expendables' movies, they're doubling up for 'Escape Plan', due out tomorrow.
You can check out a clip from the movie right here...