Sylvester Stallone and Arnold Schwarzenegger - Sly and Arnie - occupy a unique place in the history of cinema.
They are the men who basically invented the Muscleman Movie.
There have always been strapping actors - such as Johnny Weissmuller as Tarzan, Sean Connery as Bond - but their bodies were real male bodies, not freakishly OTT parodies of masculinity.
Sly, 67, and Arnie, 66, with their pumpkin-sized biceps and man boobs, have forever changed our perception of manliness both on and off screen.
In their new film Escape Plan, which opens here Oct 24, the pair play prisoners who plot to break out of the world's ultimate prison.
Of course, they have a punch-up. But what we really want to know is who wins the CAREER punch-up they've been engaged in for more than 30 years.