Apparently, OJ Simpson was almost disastrously cast as Terminator except producers feared he wouldn't be taken seriously.

Mick Jagger must have been stoned when he expressed an interest in playing Dr. Frank N Furter in the Rocky Horror Picture Show.

Mustachioed maverick Tom Selleck was too busy being Magnum PI to play Indiana Jones.

And finally, a major role in Moulin Rouge didn't go to Ozzy Osbourne who certainly had the dance moves - even if most of them were involuntary.