Recasting Movies-What if?

I have never made a movie but I am a movie buff. It is hard to cast movies, not every actor is suited to every movie.

I do have a theory of ‘ Stand-by’ actors which is purely and solely based on my own imagination, what I mean whit ‘stand-by’ actors is , when a studio doesn’t get the actor they want for a movie or if their budget isn’t big enough to hire a big movie star, they hire an actor that looks like the star. For example, I have seen movies which I thought were suited for Nick Nolte, but Gary Busey was cast instead,

Another example would be Mel Gibson and Aidan Quinn.

But again this is purely my own theory there is no back up for this.

Recently I came across some movie posters of classic and more modern movies with a completely new cast on…